FLUS44 KOUN 200927
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
500 AM CDT FRI MAY 20 2011

OKZ004>048-050>052-TXZ083>090-201700-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
500 AM CDT FRI MAY 20 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH TONIGHT 
ACROSS PORTIONS OF OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK INCLUDES ALL OF NORTHERN... WESTERN... CENTRAL AND 
SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS.

TIMING...
ALTHOUGH THERE IS CHANCE OF SEVERE WEATHER THIS MORNING... THE 
PRIMARY TIMING FOR SEVERE THUNDERSTORM CHANCES WILL BE THIS 
AFTERNOON AND EVENING.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS TODAY AND 
TONIGHT.

DISCUSSION...
THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS PORTIONS OF THE AREA THIS 
MORNING. THERE WILL BE A CHANCE OF ISOLATED SEVERE THUNDERSTORMS 
THIS MORNING PRODUCING STRONG WINDS... AND HAIL TO THE SIZE OF HALF 
DOLLARS. THE STORMS WILL ALSO PRODUCE LOCALLY HEAVY RAINFALL. THESE 
THUNDERSTORMS WILL MOVE EAST OUT OF THE AREA LATE THIS MORNING.

A STRONG STORM SYSTEM REMAINS TO THE WEST... AND WILL MOVE FROM THE 
ROCKIES INTO THE HIGH PLAINS TODAY. SCATTERED THUNDERSTORMS WILL 
LIKELY REDEVELOP THIS AFTERNOON ACROSS WESTERN OKLAHOMA AND WESTERN 
NORTH TEXAS AND THERE WILL AGAIN BE A RISK OF SEVERE THUNDERSTORMS 
AS THESE STORMS MOVE EAST. HOWEVER... IT REMAINS UNCERTAIN HOW 
UNSTABLE THE AIRMASS WILL BECOME THIS AFTERNOON IN THE WAKE OF THE 
MORNING THUNDERSTORMS AND THIS WILL AFFECT HOW LIKELY THAT 
THUNDERSTORMS WILL REDEVELOP AND THE POTENTIAL OF SEVERE WEATHER. 
SEVERE WEATHER THIS AFTERNOON AND EVENING WILL HAVE THE POTENTIAL TO 
PRODUCE HAIL LARGER THAN GOLFBALLS AND WIND GUSTS IN EXCESS OF 60 
MPH.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SATURDAY MAY 21.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...60 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

THUNDERSTORM OUTLOOK...
THERE WILL BE A CHANCE OF THUNDERSTORMS AGAIN BY SUNDAY AND SUNDAY 
NIGHT WITH A SLIGHT RISK OF SEVERE THUNDERSTORMS... ESPECIALLY IN 
SOUTHEAST AND SOUTH CENTRAL OKLAHOMA. THUNDERSTORM CHANCES WILL THEN 
PERSIST ACROSS OKLAHOMA AND NORTH TEXAS THROUGH WEDNESDAY.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT NOON 
TODAY.

$$



FLUS44 KOUN 201651
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1145 AM CDT FRI MAY 20 2011

OKZ004>048-050>052-TXZ083>090-211100-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1145 AM CDT FRI MAY 20 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THROUGH TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH TONIGHT 
ACROSS PORTIONS OF OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK INCLUDES PORTIONS OF SOUTHEAST OKLAHOMA... SOUTH AND 
EAST OF A HOLDENVILLE TO ARDMORE LINE. ALSO AN ISOLATED SEVERE STORM 
WILL BE POSSIBLE ACROSS WESTERN OKLAHOMA... MAINLY WEST AND NORTH OF 
LINE FROM CHEROKEE... TO WATONGA... TO WEATHERFORD AND ERICK.  

TIMING...
THE MAIN CHANCE OF SEVERE WEATHER APPEARS TO BE THROUGH THE EARLY 
AFTERNOON HOURS ALONG AND EAST OF INTERSTATE 35. HOWEVER THERE IS A 
POSSIBILITY OF ADDITIONAL THUNDERSTORM DEVELOPMENT THIS AFTERNOON 
AND EVENING ACROSS PORTIONS OF WESTERN OKLAHOMA AND WESTERN NORTH 
TEXAS. 

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR THE POSSIBILITY OF SEVERE WEATHER 
OPERATIONS THIS AFTERNOON AND TONIGHT.

DISCUSSION...
THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS PORTIONS OF CENTRAL AND 
SOUTHEAST OKLAHOMA EARLY THIS AFTERNOON. THERE WILL BE A CHANCE OF 
ISOLATED SEVERE THUNDERSTORMS WITH THIS ACTIVITY PRODUCING 
STRONG WINDS... AND HAIL TO THE SIZE OF HALF DOLLARS. THE STORMS 
WILL ALSO PRODUCE LOCALLY HEAVY RAINFALL. THESE THUNDERSTORMS ARE 
EXPECTED TO MOVE EAST OUT OF THE AREA LATER THIS AFTERNOON.

MEANWHILE... A STRONG STORM SYSTEM REMAINS TO THE WEST... AND WILL 
MOVE FROM THE ROCKIES INTO THE PLAINS THIS AFTERNOON AND TONIGHT. 
HOWEVER... THE WIDESPREAD PRECIPITATION AND ASSOCIATED CLOUD COVER 
FROM THE EARLIER STORMS ARE EXPECTED TO LIMIT INSTABILITY TODAY 
AHEAD OF THE DRYLINE. ALTHOUGH SOME THUNDERSTORMS MAY DEVELOP ALONG 
A DRYLINE ACROSS FAR WESTERN OKLAHOMA AND ADJACENT PART OF WESTERN 
NORTH TEXAS THIS AFTERNOON... AND AN ISOLATED SEVERE STORM COULD 
OCCUR... ORGANIZED WIDESPREAD SEVERE WEATHER IS NOT ANTICIPATED.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SATURDAY MAY 21.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...40 PERCENT.

OTHER HAZARDOUS WEATHER...
HEAVY RAINFALL COULD CAUSE LOCALIZED FLOODING OF LOW-LYING AND FLOOD 
PRONE AREAS THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

THUNDERSTORM OUTLOOK...
THERE WILL BE A CHANCE OF THUNDERSTORMS AGAIN BY SUNDAY AND SUNDAY 
NIGHT WITH A SLIGHT RISK OF SEVERE THUNDERSTORMS... ESPECIALLY IN 
SOUTHEAST AND SOUTH CENTRAL OKLAHOMA. THUNDERSTORM CHANCES WILL THEN 
PERSIST ACROSS OKLAHOMA AND NORTH TEXAS THROUGH WEDNESDAY.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM 
SATURDAY.

$$



FLUS44 KOUN 210234 AAA
HWOOUN

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
934 PM CDT FRI MAY 20 2011

OKZ004>048-050>052-TXZ083>090-211100-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
934 PM CDT FRI MAY 20 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
NO THUNDERSTORMS ARE EXPECTED OVERNIGHT.

DISCUSSION...
A FEW SHOWERS MAY STILL AFFECT FAR SOUTHEAST OKLAHOMA TONIGHT. 
HOWEVER... THE LACK OF SUFFICIENT INSTABILITY WILL PREVENT THE 
DEVELOPMENT OF THUNDERSTORMS IN THE AREA.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SATURDAY MAY 21.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...10 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...0 PERCENT.

OTHER HAZARDOUS WEATHER...
PATCHY FOG WILL BE POSSIBLE OVERNIGHT INTO SATURDAY MORNING ACROSS 
APPROXIMATELY THE CENTRAL THIRD OF OKLAHOMA AND PARTS OF NORTH 
TEXAS. DRIVERS NEED TO BE PREPARED FOR THE POSSIBILITY OF A SUDDEN 
REDUCTION IN VISIBILITY.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

THUNDERSTORM OUTLOOK...
THERE WILL BE A CHANCE OF THUNDERSTORMS AGAIN BY SUNDAY AND SUNDAY 
NIGHT WITH A SLIGHT RISK OF SEVERE THUNDERSTORMS... ESPECIALLY IN 
SOUTHEAST AND SOUTH CENTRAL OKLAHOMA. THUNDERSTORM CHANCES WILL THEN 
PERSIST ACROSS OKLAHOMA AND NORTH TEXAS THROUGH WEDNESDAY.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM 
SATURDAY.

$$

MAXWELL



FLUS44 KOUN 210930
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
430 AM CDT SAT MAY 21 2011

OKZ004>048-050>052-TXZ083>090-211700-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
430 AM CDT SAT MAY 21 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF 
OKLAHOMA.

LOCATION...
THE SLIGHT RISK IS GENERALLY NEAR AND EAST OF INTERSTATE 35.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE THIS 
AFTERNOON AND EVENING.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS THIS AFTERNOON 
AND EVENING.

DISCUSSION...
A STORM SYSTEM OVER COLORADO AND NEW MEXICO WILL MOVE EAST TOWARD 
THE PLAINS TODAY. MEANWHILE... A DRYLINE LOCATED OVER WESTERN 
OKLAHOMA AND WESTERN NORTH TEXAS THIS MORNING WILL MOVE EAST TOWARD 
THE INTERSTATE 35 CORRIDOR THIS AFTERNOON. AS TEMPERATURES WARM AND 
THE ATMOSPHERE BECOMES MORE UNSTABLE THIS AFTERNOON... THUNDERSTORMS 
MAY FORM NEAR AND EAST OF THE DRYLINE. IF STORMS DO DEVELOP... 
SEVERE THUNDERSTORMS WILL BE LIKELY WITH THE POSSIBILITY OF HAIL 
LARGER THAN GOLF BALLS... THUNDERSTORM WINDS IN EXCESS OF 60 MPH... 
AND AT LEAST A LOW CHANCE OF TORNADOES. THE STORMS WILL MOVE EAST 
INTO EASTERN OKLAHOMA LATE THIS AFTERNOON AND THIS EVENING.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SUNDAY MAY 22.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...40 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...60 PERCENT.

OTHER HAZARDOUS WEATHER...
LOCALLY DENSE FOG WILL EXIST THIS MORNING ACROSS PORTIONS OF CENTRAL 
AND SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THUNDERSTORM OUTLOOK...
THE PATTERN WILL REMAIN QUITE ACTIVE ACROSS OKLAHOMA AND NORTH TEXAS 
OVER THE NEXT FEW DAYS. THERE IS A SLIGHT RISK OF SEVERE 
THUNDERSTORMS ACROSS SOUTHEASTERN AND SOUTH CENTRAL OKLAHOMA AND A 
PORTION OF NORTH TEXAS ON SUNDAY... AND ACROSS THE ENTIRE AREA ON 
MONDAY. THUNDERSTORM CHANCES WILL CONTINUE ACROSS THE AREA TUESDAY 
AND INTO WEDNESDAY.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT NOON 
TODAY.
$$



FLUS44 KOUN 211649
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1150 AM CDT SAT MAY 21 2011

OKZ004>048-050>052-TXZ083>090-221100-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1150 AM CDT SAT MAY 21 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THROUGH TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF 
OKLAHOMA.

LOCATION...
THE SLIGHT RISK IS ALONG AND EAST OF INTERSTATE 35.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE BETWEEN 4 PM 
AND 9 PM THIS AFTERNOON AND EVENING.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS THIS AFTERNOON 
AND EVENING.

DISCUSSION...
A STORM SYSTEM OVER COLORADO AND NEW MEXICO WILL MOVE EAST TOWARD 
THE PLAINS TODAY. MEANWHILE... A DRYLINE LOCATED OVER WESTERN 
OKLAHOMA AND WESTERN NORTH TEXAS AT MIDDAY WILL CONTINUE TO MOVE 
EAST TOWARD THE INTERSTATE 35 CORRIDOR THIS AFTERNOON. AS 
TEMPERATURES WARM AND RICHER MOISTURE ACROSS EASTERN TEXAS BEGINS TO 
MOVE BACK INTO PORTIONS OF EASTERN AND CENTRAL OKLAHOMA THE 
ATMOSPHERE WILL BECOME INCREASINGLY UNSTABLE THIS AFTERNOON. BY LATE 
THIS AFTERNOON THUNDERSTORMS MAY FORM NEAR AND EAST OF THE 
DRYLINE... WHICH IS EXPECTED TO BE JUST EAST OF INTERSTATE 35. IF 
STORMS DO DEVELOP... SEVERE THUNDERSTORMS WILL BE LIKELY WITH THE 
POSSIBILITY OF HAIL LARGER THAN GOLF BALLS... THUNDERSTORM WINDS IN 
EXCESS OF 60 MPH... AND AT LEAST A LOW CHANCE OF TORNADOES. THE 
STORMS WILL MOVE EAST INTO EASTERN OKLAHOMA THIS EVENING.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SUNDAY MAY 22.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...40 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...60 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THUNDERSTORM OUTLOOK...
THE PATTERN WILL REMAIN QUITE ACTIVE ACROSS OKLAHOMA AND NORTH TEXAS 
OVER THE NEXT FEW DAYS. THERE IS A SLIGHT RISK OF SEVERE 
THUNDERSTORMS ACROSS SOUTHEASTERN AND SOUTH CENTRAL OKLAHOMA AND A 
PORTION OF NORTH TEXAS ON SUNDAY... AND ACROSS THE ENTIRE AREA ON 
MONDAY. THUNDERSTORM CHANCES WILL CONTINUE ACROSS THE AREA TUESDAY 
AND INTO WEDNESDAY.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM 
SUNDAY.

$$



FLUS44 KOUN 220029
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
730 PM CDT SAT MAY 21 2011

OKZ004>048-050>052-TXZ083>090-221100-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
730 PM CDT SAT MAY 21 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF 
OKLAHOMA.

LOCATION...
THE SLIGHT RISK IS EAST OF A LINE FROM CUSHING TO WAURIKA.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS IS UNTIL 10 PM.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS THIS EVENING.

DISCUSSION...
A DRYLINE LOCATED THROUGH CENTRAL OKLAHOMA AND EXTREMELY HUMID AIR 
TO ITS EAST HAVE BEEN SUFFICIENT TO GENERATE A FEW THUNDERSTORMS IN 
SOUTH CENTRAL OKLAHOMA. FEW ADDITIONAL THUNDERSTORMS ARE EXPECTED IN 
THIS AREA UNTIL MID-EVENING EVENING. DEVELOPMENT WILL DECREASE SHORTLY 
AFTER SUNSET. SEVERE THUNDERSTORMS ARE LIKELY WITH THE POSSIBILITY 
OF HAIL LARGER THAN GOLF BALLS... THUNDERSTORM WINDS IN EXCESS OF 60 
MPH... AND AT LEAST A LOW CHANCE OF TORNADOES. THE STORMS WILL MOVE 
NORTHEAST INTO EASTERN OKLAHOMA LATE THIS EVENING.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SUNDAY MAY 22.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...80 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THUNDERSTORM OUTLOOK...
THE PATTERN WILL REMAIN QUITE ACTIVE ACROSS OKLAHOMA AND NORTH TEXAS 
OVER THE NEXT FEW DAYS. THERE IS A SLIGHT RISK OF SEVERE 
THUNDERSTORMS ACROSS SOUTHEASTERN AND SOUTH CENTRAL OKLAHOMA AND A 
PORTION OF NORTH TEXAS ON SUNDAY... AND ACROSS THE ENTIRE AREA ON 
MONDAY. THUNDERSTORM CHANCES WILL CONTINUE ACROSS THE AREA TUESDAY 
AND INTO WEDNESDAY.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM 
SUNDAY.

$$



FLUS44 KOUN 220308
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1008 PM CDT SAT MAY 21 2011

OKZ004>048-050>052-TXZ083>090-221100-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1008 PM CDT SAT MAY 21 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
NO THUNDERSTORMS ARE EXPECTED TONIGHT.

DISCUSSION...
WITH THE ATMOSPHERE BECOMING MORE STABLE... ADDITIONAL THUNDERSTORMS 
ARE NOT EXPECTED OVERNIGHT.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SUNDAY MAY 22.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...10 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...0 PERCENT.

OTHER HAZARDOUS WEATHER...
PATCHY FOG MAY DEVELOP IN PARTS OF OKLAHOMA AND NORTH TEXAS 
OVERNIGHT INTO SUNDAY MORNING. IF FOG DEVELOPS... DRIVERS BE 
PREPARED FOR SUDDEN REDUCTIONS IN VISIBILITY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THUNDERSTORM OUTLOOK...
THE PATTERN WILL REMAIN QUITE ACTIVE ACROSS OKLAHOMA AND NORTH TEXAS 
OVER THE NEXT FEW DAYS. THERE IS A SLIGHT RISK OF SEVERE 
THUNDERSTORMS ACROSS SOUTHEASTERN AND SOUTH CENTRAL OKLAHOMA AND A 
PORTION OF NORTH TEXAS ON SUNDAY... AND ACROSS THE ENTIRE AREA ON 
MONDAY. THUNDERSTORM CHANCES WILL CONTINUE ACROSS THE AREA TUESDAY 
AND INTO WEDNESDAY.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM 
SUNDAY.

$$



FLUS44 KOUN 220946
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
450 AM CDT SUN MAY 22 2011

OKZ004>048-050>052-TXZ083>090-221700-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
450 AM CDT SUN MAY 22 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH TONIGHT 
ACROSS PORTIONS OF OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK IS NEAR AND SOUTHEAST OF A LINE FROM BLACKWELL TO 
OKARCHE TO FREDERICK OKLAHOMA TO CROWELL TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM THIS 
AFTERNOON THROUGH THIS EVENING.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS BEGINNING AS 
EARLY AS MID AFTERNOON.

DISCUSSION...
LOW-LEVEL MOISTURE CONTINUES TO INCREASE ACROSS MUCH OF OKLAHOMA AND 
NORTH TEXAS TO THE EAST OF A DRYLINE. BY MID AFTERNOON... THE 
DRYLINE IS EXPECTED TO EXTEND FROM NORTH CENTRAL OKLAHOMA INTO 
SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS... ROUGHLY FROM BLACKWELL 
TO FREDERICK OKLAHOMA TO CROWELL TEXAS. SCATTERED THUNDERSTORMS WILL 
LIKELY DEVELOP NEAR AND EAST OF THE DRYLINE THIS AFTERNOON. THE 
AIRMASS TO THE EAST OF THE DRYLINE WILL BECOME VERY UNSTABLE THIS 
AFTERNOON AND WILL SUPPORT SEVERE THUNDERSTORMS. HAIL LARGER THAN 
BASEBALLS... WIND GUSTS OVER 70 MPH AND ISOLATED TORNADOES WILL BE 
POSSIBLE. THUNDERSTORMS MAY BECOME MORE WIDESPREAD THIS EVENING WITH 
A CONTINUING RISK OF SEVERE WEATHER.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT MONDAY MAY 23.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...70 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...70 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE ENTIRE 
AREA ON MONDAY... AND ACROSS ALL BUT FAR WESTERN PORTIONS OF 
OKLAHOMA AND NORTH TEXAS ON TUESDAY. THE WEATHER PATTERN WILL REMAIN 
VERY ACTIVE ACROSS THE SOUTHERN PLAINS EARLY THIS WEEK AS A STRONG 
UPPER LEVEL STORM SYSTEM IN THE WESTERN UNITED STATES SLOWLY MOVES 
TOWARD THE PLAINS. ALTHOUGH THE DAY-TO-DAY AREA AND DEGREE OF SEVERE 
WEATHER RISK WILL BE VERY DEPENDENT ON WHERE PREVIOUS THUNDERSTORMS 
OR THUNDERSTORM COMPLEXES DEVELOP AND MOVE... THE LARGE SCALE 
WEATHER PATTERN WILL REMAIN VERY FAVORABLE FOR SEVERE THUNDERSTORMS 
MONDAY THROUGH TUESDAY NIGHT... WITH THE CONTINUED RISK OF VERY 
LARGE HAIL... DAMAGING WINDS AND TORNADOES. EMERGENCY MANAGERS AND 
STORM SPOTTERS SHOULD CONTINUE TO MONITOR FORECAST INFORMATION OVER 
THE NEXT FEW DAYS.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT NOON 
TODAY.

$$



FLUS44 KOUN 221647
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1150 AM CDT SUN MAY 22 2011

OKZ004>048-050>052-TXZ083>090-231100-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1150 AM CDT SUN MAY 22 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THROUGH TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH TONIGHT 
ACROSS PORTIONS OF OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK IS NEAR AND SOUTHEAST OF A LINE FROM MEDFORD... TO 
WATONGA... TO HOBART OKLAHOMA TO VERNON AND BENJAMIN TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM 2 PM THIS 
AFTERNOON THROUGH 10 PM THIS EVENING.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS THIS AFTERNOON 
AND TONIGHT.

DISCUSSION...
LOW-LEVEL MOISTURE CONTINUES TO INCREASE ACROSS MUCH OF OKLAHOMA AND 
NORTH TEXAS TO THE EAST OF A DRYLINE. BY MID AFTERNOON... THE 
DRYLINE IS EXPECTED TO EXTEND FROM NORTH CENTRAL OKLAHOMA INTO 
SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS... ROUGHLY FROM PONCA 
CITY... TO OKLAHOMA CITY... TO LAWTON OKLAHOMA TO WICHITA FALLS AND 
SEYMOUR TEXAS. SCATTERED THUNDERSTORMS WILL LIKELY DEVELOP NEAR AND 
EAST OF THE DRYLINE THIS AFTERNOON. THE AIRMASS TO THE EAST OF THE 
DRYLINE WILL BECOME VERY UNSTABLE THIS AFTERNOON AND WILL SUPPORT 
SEVERE THUNDERSTORMS. HAIL LARGER THAN BASEBALLS... WIND GUSTS OVER 
70 MPH AND ISOLATED TORNADOES WILL BE POSSIBLE. 

DURING THE EVENING HOURS THE DRYLINE IS EXPECTED TO RETREAT BACK TO 
THE NORTH AND WEST. AS THIS OCCURS... WITH THE AID OF AN INCREASING 
LOW LEVEL JET... ADDITIONAL THUNDERSTORM DEVELOPMENT IS EXPECTED TO 
OCCUR FURTHER NORTH AND WEST ACROSS OKLAHOMA. THIS ACTIVITY WILL 
ALSO POSE A SEVERE THREAT WITH LARGE HAIL AND DAMAGING WIND GUSTS AS 
WELL AS VERY HEAVY RAINFALL. 

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT MONDAY MAY 23.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...70 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF 
CENTRAL AND WESTERN OKLAHOMA AND WESTERN NORTH TEXAS ON MONDAY WITH 
A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE REMAINDER OF 
OKLAHOMA AND WESTERN NORTH TEXAS. THERE IS ALSO A SLIGHT RISK OF 
SEVERE THUNDERSTORMS ACROSS ALL BUT FAR WESTERN PORTIONS OF 
OKLAHOMA AND NORTH TEXAS ON TUESDAY. 

THE WEATHER PATTERN WILL REMAIN VERY ACTIVE ACROSS THE SOUTHERN 
PLAINS EARLY THIS WEEK AS A STRONG UPPER LEVEL STORM SYSTEM IN THE 
WESTERN UNITED STATES SLOWLY MOVES TOWARD THE PLAINS. ALTHOUGH THE 
DAY-TO-DAY AREA AND DEGREE OF SEVERE WEATHER RISK WILL BE VERY 
DEPENDENT ON WHERE PREVIOUS THUNDERSTORMS OR THUNDERSTORM COMPLEXES 
DEVELOP AND MOVE... THE LARGE SCALE WEATHER PATTERN WILL REMAIN VERY 
FAVORABLE FOR SEVERE THUNDERSTORMS MONDAY THROUGH TUESDAY NIGHT... 
WITH THE CONTINUED RISK OF VERY LARGE HAIL... DAMAGING WINDS AND 
TORNADOES. EMERGENCY MANAGERS AND STORM SPOTTERS SHOULD CONTINUE TO 
MONITOR FORECAST INFORMATION OVER THE NEXT FEW DAYS.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM 
MONDAY.

$$



FLUS44 KOUN 230019
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
718 PM CDT SUN MAY 22 2011

OKZ004>048-050>052-TXZ083>090-231100-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
718 PM CDT SUN MAY 22 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH TONIGHT 
ACROSS PORTIONS OF OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE SLIGHT RISK IS NEAR AND SOUTHEAST OF A LINE FROM MEDFORD... TO 
WATONGA... TO HOBART OKLAHOMA TO VERNON AND BENJAMIN TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE THROUGH 10 PM 
THIS EVENING. HOWEVER... SEVERE STORMS WILL BE POSSIBLE INTO EARLY 
MONDAY MORNING.

IMPACTS...
HAIL TO THE SIZE OF BASEBALLS OR LARGER AND WIND GUSTS TO 70 MPH. A 
FEW TORNADOES ARE POSSIBLE THIS EVENING.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS TONIGHT.

DISCUSSION...
SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP TONIGHT ACROSS 
PORTIONS OF OKLAHOMA AND NORTH TEXAS AS LOW-LEVEL MOISTURE CONTINUES 
TO INCREASE ACROSS MUCH OF OKLAHOMA AND NORTH TEXAS TO THE EAST OF A 
DRYLINE. THIS AIRMASS IS VERY UNSTABLE SUPPORTING THUNDERSTORMS 
PRODUCING VERY LARGE HAIL AND STRONG WIND GUSTS. ISOLATED TORNADOES 
WILL ALSO BE POSSIBLE. 

THE MOISTURE IS EXPECTED TO SPREAD BACK TO THE NORTH AND WEST. AS 
THIS OCCURS... WITH THE AID OF AN INCREASING LOW LEVEL JET... 
ADDITIONAL THUNDERSTORM DEVELOPMENT IS EXPECTED TO OCCUR FURTHER 
NORTH AND WEST ACROSS OKLAHOMA OVERNIGHT INTO MONDAY MORNING. THIS 
ACTIVITY WILL ALSO POSE A SEVERE THREAT WITH LARGE HAIL AND DAMAGING 
WIND GUSTS AS WELL AS VERY HEAVY RAINFALL. 

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT MONDAY MAY 23.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF 
CENTRAL AND WESTERN OKLAHOMA AND WESTERN NORTH TEXAS ON MONDAY WITH 
A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE REMAINDER OF 
OKLAHOMA AND WESTERN NORTH TEXAS. THERE IS ALSO A SLIGHT RISK OF 
SEVERE THUNDERSTORMS ACROSS ALL BUT FAR WESTERN PORTIONS OF 
OKLAHOMA AND NORTH TEXAS ON TUESDAY. 

THE WEATHER PATTERN WILL REMAIN VERY ACTIVE ACROSS THE SOUTHERN 
PLAINS EARLY THIS WEEK AS A STRONG UPPER LEVEL STORM SYSTEM IN THE 
WESTERN UNITED STATES SLOWLY MOVES TOWARD THE PLAINS. ALTHOUGH THE 
DAY-TO-DAY AREA AND DEGREE OF SEVERE WEATHER RISK WILL BE VERY 
DEPENDENT ON WHERE PREVIOUS THUNDERSTORMS OR THUNDERSTORM COMPLEXES 
DEVELOP AND MOVE... THE LARGE SCALE WEATHER PATTERN WILL REMAIN VERY 
FAVORABLE FOR SEVERE THUNDERSTORMS MONDAY THROUGH TUESDAY NIGHT... 
WITH THE CONTINUED RISK OF VERY LARGE HAIL... DAMAGING WINDS AND 
TORNADOES. EMERGENCY MANAGERS AND STORM SPOTTERS SHOULD CONTINUE TO 
MONITOR FORECAST INFORMATION OVER THE NEXT FEW DAYS.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM 
MONDAY.

$$



FLUS44 KOUN 230245
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
945 PM CDT SUN MAY 22 2011

OKZ004>048-050>052-TXZ083>090-231100-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
945 PM CDT SUN MAY 22 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVERNIGHT ACROSS 
PORTIONS OF OKLAHOMA.

LOCATION...
THE SLIGHT RISK IS NEAR AND EAST OF A LINE FROM MEDFORD AND ENID... 
TO EL RENO AND CHICKASHA... TO DUNCAN OKLAHOMA.

TIMING...
SEVERE STORMS WILL BE POSSIBLE INTO EARLY MONDAY MORNING.

IMPACTS...
HAIL TO THE SIZE OF GOLFBALLS AND WIND GUSTS TO 60 MPH.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR POSSIBLE SEVERE WEATHER OPERATIONS 
OVERNIGHT.

DISCUSSION...
MOISTURE WILL CONTINUE TO SPREAD WEST AND NORTH ACROSS THE REGION 
OVERNIGHT INTO MONDAY. MEANWHILE... THE LOW-LEVEL JET WILL ALSO 
INCREASE OVERNIGHT WHICH MAY PROVIDE ADDITIONAL LIFT FOR 
THUNDERSTORMS TO DEVELOP. THE MOST LIKELY AREA FOR THUNDERSTORMS TO 
DEVELOP OVERNIGHT INTO MONDAY MORNING WILL BE ACROSS PORTIONS OF 
NORTHERN OKLAHOMA. IF ADDITIONAL STORMS DO DEVELOP...SOME COULD 
BECOME SEVERE PRODUCING LARGE HAIL AND GUSTY WINDS. VERY HEAVY 
RAINFALL AND FREQUENT LIGHTNING WILL ALSO BE A CONCERN.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT MONDAY MAY 23.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...50 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...30 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF 
CENTRAL AND WESTERN OKLAHOMA AND WESTERN NORTH TEXAS ON MONDAY WITH 
A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE REMAINDER OF 
OKLAHOMA AND WESTERN NORTH TEXAS. THERE IS ALSO A SLIGHT RISK OF 
SEVERE THUNDERSTORMS ACROSS ALL BUT FAR WESTERN PORTIONS OF 
OKLAHOMA AND NORTH TEXAS ON TUESDAY. 

THE WEATHER PATTERN WILL REMAIN VERY ACTIVE ACROSS THE SOUTHERN 
PLAINS EARLY THIS WEEK AS A STRONG UPPER LEVEL STORM SYSTEM IN THE 
WESTERN UNITED STATES SLOWLY MOVES TOWARD THE PLAINS. ALTHOUGH THE 
DAY-TO-DAY AREA AND DEGREE OF SEVERE WEATHER RISK WILL BE VERY 
DEPENDENT ON WHERE PREVIOUS THUNDERSTORMS OR THUNDERSTORM COMPLEXES 
DEVELOP AND MOVE... THE LARGE SCALE WEATHER PATTERN WILL REMAIN VERY 
FAVORABLE FOR SEVERE THUNDERSTORMS MONDAY THROUGH TUESDAY NIGHT... 
WITH THE CONTINUED RISK OF VERY LARGE HAIL... DAMAGING WINDS AND 
TORNADOES. EMERGENCY MANAGERS AND STORM SPOTTERS SHOULD CONTINUE TO 
MONITOR FORECAST INFORMATION OVER THE NEXT FEW DAYS.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM 
MONDAY.

$$



FLUS44 KOUN 231014
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
514 AM CDT MON MAY 23 2011

OKZ004>048-050>052-TXZ083>090-231700-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
514 AM CDT MON MAY 23 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF 
NORTHERN OKLAHOMA. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS 
ACROSS MUCH OF CENTRAL AND SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
THE MODERATE RISK IS NORTH OF A LINE FROM ARNETT TO KINGFISHER TO 
STILLWATER. THE SLIGHT RISK IS SOUTH OF THE MODERATE RISK ACROSS THE 
REMAINDER OF WESTERN... CENTRAL AND SOUTHERN OKLAHOMA AND WESTERN 
NORTH TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE WEATHER WILL BE THIS AFTERNOON AND 
EVENING... ALTHOUGH THE RISK OF SEVERE WEATHER WILL CONTINUE 
OVERNIGHT.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR THE POTENTIAL OF SEVERE WEATHER OPERATIONS 
THIS AFTERNOON THROUGH THE OVERNIGHT HOURS.

DISCUSSION...
A DRYLINE ACROSS THE OKLAHOMA AND TEXAS PANHANDLE THIS MORNING WILL 
MOVE EAST AND TOWARD THE BORDER OF WESTERN OKLAHOMA AND THE TEXAS 
PANHANDLE. MEANWHILE A COLD FRONT THAT EXTENDED ACROSS CENTRAL AND 
SOUTHWEST KANSAS WILL MOVE SOUTHEAST AND BECOME NEARLY STATIONARY 
NEAR THE KANSAS OKLAHOMA BORDER. THUNDERSTORMS WILL LIKELY DEVELOP 
AGAIN THIS AFTERNOON... ESPECIALLY NEAR THE STATIONARY FRONT IN THE 
NORTH... WITH OTHER STORMS POTENTIALLY DEVELOPING NEAR THE DRYLINE 
ACROSS WESTERN OKLAHOMA AND WESTERN NORTH TEXAS. OTHER ISOLATED 
STORMS MAY DEVELOP ELSEWHERE ACROSS THE AREA THIS AFTERNOON AND 
EVENING. THE ATMOSPHERE WILL ONCE AGAIN BECOME VERY UNSTABLE OVER 
OKLAHOMA AND NORTH TEXAS AND WILL SUPPORT SUPERCELLS CAPABLE OF 
PRODUCING HAIL LARGER THAN BASEBALLS... DAMAGING WINDS OVER 65 
MPH... AND ISOLATED TORNADOES. STORMS WILL LIKELY BECOME MORE 
WIDESPREAD THIS EVENING WITH THE CONTINUED POTENTIAL FOR SCATTERED 
SEVERE THUNDERSTORMS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT TUESDAY MAY 24.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...80 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

THUNDERSTORM OUTLOOK...
THE CHANCE OF SEVERE THUNDERSTORMS WILL DEVELOP AGAIN TUESDAY... 
ESPECIALLY NEAR AND EAST OF INTERSTATE 35 WHERE THERE IS A MODERATE 
RISK OF SEVERE THUNDERSTORMS. THUNDERSTORM CHANCES CONTINUE 
WEDNESDAY AND WEDNESDAY NIGHT ALTHOUGH THE RISK OF SEVERE WEATHER 
WILL LIKELY MOVE EAST OF THE AREA.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT NOON 
TODAY.
$$



FLUS44 KOUN 231428
HWOOUN

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
915 AM CDT MON MAY 23 2011

OKZ004>048-050>052-TXZ083>090-231700-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
514 AM CDT MON MAY 23 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF 
CENTRAL AND NORTHERN OKLAHOMA. THERE IS A SLIGHT RISK OF SEVERE 
THUNDERSTORMS ACROSS MUCH OF THE REMAINDER OF OKLAHOMA AND WESTERN 
NORTH TEXAS.

LOCATION...
THE MODERATE RISK IS NORTH AND EAST OF A LINE FROM MCALESTER TO 
LAWTON TO WOODWARD. THE SLIGHT RISK IS SOUTH AND WEST OF THE 
MODERATE RISK ACROSS THE REMAINDER OF OKLAHOMA AND WESTERN NORTH 
TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE WEATHER WILL BE THIS AFTERNOON AND 
EVENING... ALTHOUGH THE RISK OF SEVERE WEATHER WILL CONTINUE 
OVERNIGHT.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR THE POTENTIAL OF SEVERE WEATHER OPERATIONS 
THIS AFTERNOON THROUGH THE OVERNIGHT HOURS.

DISCUSSION...
A DRYLINE ACROSS THE OKLAHOMA AND TEXAS PANHANDLE THIS MORNING WILL 
MOVE EAST AND TOWARD THE BORDER OF WESTERN OKLAHOMA AND THE TEXAS 
PANHANDLE. MEANWHILE A COLD FRONT WILL DRIFT SOUTHWARD INTO 
NORTHWEST OKLAHOMA...WHILE AN OUTFLOW BOUNDARY FROM STORMS IN 
NORTHEAST OKLAHOMA MOVES INTO NORTH CENTRAL OKLAHOMA. THUNDERSTORMS 
WILL LIKELY DEVELOP AGAIN THIS AFTERNOON... ESPECIALLY NEAR THE 
FRONT AND OUTFLOW BOUNDARY IN THE NORTH... WITH OTHER STORMS 
POTENTIALLY DEVELOPING NEAR THE DRYLINE ACROSS WESTERN OKLAHOMA AND 
WESTERN NORTH TEXAS. OTHER ISOLATED STORMS MAY DEVELOP ELSEWHERE 
ACROSS THE AREA THIS AFTERNOON AND EVENING. THE ATMOSPHERE WILL ONCE 
AGAIN BECOME VERY UNSTABLE OVER OKLAHOMA AND NORTH TEXAS AND WILL 
SUPPORT SUPERCELLS CAPABLE OF PRODUCING HAIL LARGER THAN 
BASEBALLS... DAMAGING WINDS OVER 65 MPH... AND ISOLATED TORNADOES. 
STORMS WILL LIKELY BECOME MORE WIDESPREAD THIS EVENING WITH THE 
CONTINUED POTENTIAL FOR SCATTERED SEVERE THUNDERSTORMS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT TUESDAY MAY 24.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...80 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

THUNDERSTORM OUTLOOK...
THE CHANCE OF SEVERE THUNDERSTORMS WILL DEVELOP AGAIN TUESDAY... 
ESPECIALLY NEAR AND EAST OF INTERSTATE 35 WHERE THERE IS A MODERATE 
RISK OF SEVERE THUNDERSTORMS. THUNDERSTORM CHANCES CONTINUE 
WEDNESDAY AND WEDNESDAY NIGHT ALTHOUGH THE RISK OF SEVERE WEATHER 
WILL LIKELY MOVE EAST OF THE AREA.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT NOON 
TODAY.
$$



FLUS44 KOUN 231710
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1155 AM CDT MON MAY 23 2011

OKZ004>048-050>052-TXZ083>090-231700-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1155 AM CDT MON MAY 23 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF 
CENTRAL AND WESTERN OKLAHOMA. THERE IS A SLIGHT RISK OF SEVERE 
THUNDERSTORMS ACROSS MUCH OF THE REMAINDER OF OKLAHOMA AND WESTERN 
NORTH TEXAS.

LOCATION...
THE MODERATE RISK IS EAST OF A WOODWARD TO ALTUS LINE...AND NORTH OF 
A FREDERICK TO WAURIKA TO HOLDENVILLE LINE. THE SLIGHT RISK IS SOUTH 
AND WEST OF THE MODERATE RISK ACROSS THE REMAINDER OF OKLAHOMA AND 
WESTERN NORTH TEXAS.

IMPACTS...DAMAGE TO HOMES...CARS AND VEGETATION POSSIBLE FROM HAIL  
TO THE SIZE OF BASEBALLS AND DAMAGING WIND GUSTS OVER 65 MPH. 

TIMING...
THE MOST LIKELY TIME FOR SEVERE WEATHER WILL BE THIS AFTERNOON AND 
EVENING... ALTHOUGH THE RISK OF SEVERE WEATHER WILL CONTINUE 
OVERNIGHT.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR THE POTENTIAL OF SEVERE WEATHER OPERATIONS 
THIS AFTERNOON THROUGH THE OVERNIGHT HOURS.

DISCUSSION...
A DRYLINE ACROSS THE OKLAHOMA AND TEXAS PANHANDLE WILL MOVE TO NEAR 
THE BORDER OF WESTERN OKLAHOMA AND THE TEXAS PANHANDLE THIS 
AFTERNOON. MEANWHILE...A COLD FRONT WILL BECOME STATIONARY ACROSS 
NORTHWEST OKLAHOMA...WHILE AN OUTFLOW BOUNDARY FROM STORMS IN 
NORTHEAST OKLAHOMA REMAINS IN NORTH CENTRAL OKLAHOMA. THUNDERSTORMS 
WILL LIKELY DEVELOP THIS AFTERNOON... ESPECIALLY NEAR THE FRONT 
AND OUTFLOW BOUNDARY IN THE NORTH... WITH OTHER STORMS POTENTIALLY 
DEVELOPING NEAR THE DRYLINE ACROSS WESTERN OKLAHOMA AND WESTERN 
NORTH TEXAS. OTHER ISOLATED STORMS MAY DEVELOP ELSEWHERE ACROSS THE 
AREA THIS AFTERNOON AND EVENING. THE ATMOSPHERE WILL ONCE AGAIN 
BE VERY UNSTABLE OVER OKLAHOMA AND NORTH TEXAS AND WILL SUPPORT 
SUPERCELLS CAPABLE OF PRODUCING HAIL LARGER THAN BASEBALLS... 
DAMAGING WINDS OVER 65 MPH... AND ISOLATED TORNADOES. STORMS WILL 
LIKELY BECOME MORE WIDESPREAD THIS EVENING AS THEY MOVE EASTWARD 
ACROSS OKLAHOMA AND NORTH TEXAS WITH THE CONTINUED POTENTIAL FOR 
SCATTERED SEVERE THUNDERSTORMS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT TUESDAY MAY 24.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...80 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

THUNDERSTORM OUTLOOK...
THERE IS A POTENTIAL FOR MORE WIDESPREAD AND SIGNIFICANT SEVERE 
WEATHER ON TUESDAY...ESPECIALLY NEAR AND EAST OF INTERSTATE 35 WHERE 
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS. SEVERE STORMS ARE 
EXPECTED TO DEVELOP BY AFTERNOON AS A STRONG UPPER SYSTEM LIFTS 
NORTHEASTWARD FROM THE SOUTHERN ROCKIES AND INTERACTS WITH A 
STRENGTHENING DRYLINE PUSHING INTO OKLAHOMA AND WESTERN NORTH TEXAS. 
VERY LARGE HAI...DAMAGING WINDS...AND TORNADOES WILL BE POSSIBLE.  
THUNDERSTORM CHANCES CONTINUE WEDNESDAY AND WEDNESDAY NIGHT ALTHOUGH 
THE RISK OF SEVERE WEATHER WILL LIKELY MOVE EAST OF THE AREA.


OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM 
TUESDAY. 

$$



FLUS44 KOUN 231711
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1158 AM CDT MON MAY 23 2011

OKZ004>048-050>052-TXZ083>090-241000-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1158 AM CDT MON MAY 23 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF 
CENTRAL AND WESTERN OKLAHOMA. THERE IS A SLIGHT RISK OF SEVERE 
THUNDERSTORMS ACROSS MUCH OF THE REMAINDER OF OKLAHOMA AND WESTERN 
NORTH TEXAS.

LOCATION...
THE MODERATE RISK IS EAST OF A WOODWARD TO ALTUS LINE...AND NORTH OF 
A FREDERICK TO WAURIKA TO HOLDENVILLE LINE. THE SLIGHT RISK IS SOUTH 
AND WEST OF THE MODERATE RISK ACROSS THE REMAINDER OF OKLAHOMA AND 
WESTERN NORTH TEXAS.

IMPACTS...DAMAGE TO HOMES...CARS AND VEGETATION POSSIBLE FROM HAIL  
TO THE SIZE OF BASEBALLS AND DAMAGING WIND GUSTS OVER 65 MPH. 

TIMING...
THE MOST LIKELY TIME FOR SEVERE WEATHER WILL BE THIS AFTERNOON AND 
EVENING... ALTHOUGH THE RISK OF SEVERE WEATHER WILL CONTINUE 
OVERNIGHT.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR THE POTENTIAL OF SEVERE WEATHER OPERATIONS 
THIS AFTERNOON THROUGH THE OVERNIGHT HOURS.

DISCUSSION...
A DRYLINE ACROSS THE OKLAHOMA AND TEXAS PANHANDLE WILL MOVE TO NEAR 
THE BORDER OF WESTERN OKLAHOMA AND THE TEXAS PANHANDLE THIS 
AFTERNOON. MEANWHILE...A COLD FRONT WILL BECOME STATIONARY ACROSS 
NORTHWEST OKLAHOMA...WHILE AN OUTFLOW BOUNDARY FROM STORMS IN 
NORTHEAST OKLAHOMA REMAINS IN NORTH CENTRAL OKLAHOMA. THUNDERSTORMS 
WILL LIKELY DEVELOP THIS AFTERNOON... ESPECIALLY NEAR THE FRONT 
AND OUTFLOW BOUNDARY IN THE NORTH... WITH OTHER STORMS POTENTIALLY 
DEVELOPING NEAR THE DRYLINE ACROSS WESTERN OKLAHOMA AND WESTERN 
NORTH TEXAS. OTHER ISOLATED STORMS MAY DEVELOP ELSEWHERE ACROSS THE 
AREA THIS AFTERNOON AND EVENING. THE ATMOSPHERE WILL ONCE AGAIN 
BE VERY UNSTABLE OVER OKLAHOMA AND NORTH TEXAS AND WILL SUPPORT 
SUPERCELLS CAPABLE OF PRODUCING HAIL LARGER THAN BASEBALLS... 
DAMAGING WINDS OVER 65 MPH... AND ISOLATED TORNADOES. STORMS WILL 
LIKELY BECOME MORE WIDESPREAD THIS EVENING AS THEY MOVE EASTWARD 
ACROSS OKLAHOMA AND NORTH TEXAS WITH THE CONTINUED POTENTIAL FOR 
SCATTERED SEVERE THUNDERSTORMS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT TUESDAY MAY 24.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...80 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

THUNDERSTORM OUTLOOK...
THERE IS A POTENTIAL FOR MORE WIDESPREAD AND SIGNIFICANT SEVERE 
WEATHER ON TUESDAY...ESPECIALLY NEAR AND EAST OF INTERSTATE 35 WHERE 
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS. SEVERE STORMS ARE 
EXPECTED TO DEVELOP BY AFTERNOON AS A STRONG UPPER SYSTEM LIFTS 
NORTHEASTWARD FROM THE SOUTHERN ROCKIES AND INTERACTS WITH A 
STRENGTHENING DRYLINE PUSHING INTO OKLAHOMA AND WESTERN NORTH TEXAS. 
VERY LARGE HAI...DAMAGING WINDS...AND TORNADOES WILL BE POSSIBLE.  
THUNDERSTORM CHANCES CONTINUE WEDNESDAY AND WEDNESDAY NIGHT ALTHOUGH 
THE RISK OF SEVERE WEATHER WILL LIKELY MOVE EAST OF THE AREA.


OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM 
TUESDAY. 

$$



FLUS44 KOUN 232152
HWOOUN

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
453 PM CDT MON MAY 23 2011

OKZ004>048-050>052-TXZ083>090-241000-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
453 PM CDT MON MAY 23 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF 
CENTRAL AND WESTERN OKLAHOMA. THERE IS A SLIGHT RISK OF SEVERE 
THUNDERSTORMS ACROSS MUCH OF THE REMAINDER OF OKLAHOMA AND WESTERN 
NORTH TEXAS.

LOCATION...
THE MODERATE RISK IS EAST OF A WOODWARD TO ALTUS LINE...AND NORTH OF 
A FREDERICK TO WAURIKA TO HOLDENVILLE LINE. THE SLIGHT RISK IS SOUTH 
AND WEST OF THE MODERATE RISK ACROSS THE REMAINDER OF OKLAHOMA AND 
WESTERN NORTH TEXAS.

IMPACTS...
DAMAGE TO HOMES...CARS AND VEGETATION POSSIBLE FROM HAIL  TO THE 
SIZE OF BASEBALLS OR LARGER AND DAMAGING WIND GUSTS OVER 65 MPH. 
ISOLATED TORNADOES WILL ALSO BE POSSIBLE THIS EVENING. 

TIMING...
THE MOST LIKELY TIME FOR SEVERE WEATHER WILL BE THROUGH THIS EVENING.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE 
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS THROUGH THE 
OVERNIGHT HOURS.

DISCUSSION...
A DRYLINE EXTENDED SOUTH ACROSS WESTERN OKLAHOMA WHILE A STATIONARY 
FRONT AND OUTFLOW BOUNDARY EXTENDED ACROSS NORTHERN OKLAHOMA. 
THUNDERSTORMS HAVE DEVELOPED ALONG THESE BOUNDARIES LATE THIS 
AFTERNOON. THUNDERSTORMS WILL CONTINUE TO DEVELOP AND MOVE EAST 
ACROSS PARTS OF OKLAHOMA AND NORTH TEXAS THIS EVENING. THE AIRMASS 
IS VERY UNSTABLE AND IS SUPPORTING SEVERE THUNDERSTORMS. VERY LARGE 
HAIL... DAMAGING WINDS... AND ISOLATED TORNADOES WILL BE POSSIBLE. 
HEAVY RAIN AND FREQUENT CLOUD TO GROUND LIGHTNING WILL ALSO BE 
LIKELY WITH THE THUNDERSTORMS.

THUNDERSTORMS ARE EXPECTED TO DECREASE LATE THIS EVENING.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT TUESDAY MAY 24.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

THUNDERSTORM OUTLOOK...
THERE IS A POTENTIAL FOR MORE WIDESPREAD AND SIGNIFICANT SEVERE 
WEATHER ON TUESDAY. THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS 
EAST OF A LINE FROM WOODWARD... TO CLINTON AND FREDERICK OKLAHOMA... 
TO VERNON AND SEYMOUR TEXAS. SEVERE STORMS ARE EXPECTED TO DEVELOP 
BY AFTERNOON AS A STRONG UPPER SYSTEM LIFTS NORTHEASTWARD FROM THE 
SOUTHERN ROCKIES AND INTERACTS WITH A STRENGTHENING DRYLINE PUSHING 
INTO OKLAHOMA AND WESTERN NORTH TEXAS. VERY LARGE HAIL...DAMAGING 
WINDS...AND TORNADOES WILL BE POSSIBLE. THUNDERSTORM CHANCES 
CONTINUE WEDNESDAY AND WEDNESDAY NIGHT ALTHOUGH THE RISK OF SEVERE 
WEATHER WILL LIKELY MOVE EAST OF THE AREA.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM 
TUESDAY. 

$$

MAXWELL



FLUS44 KOUN 241001
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
500 AM CDT TUE MAY 24 2011

OKZ004>048-050>052-TXZ083>090-241700-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
500 AM CDT TUE MAY 24 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TODAY AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A HIGH RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON THROUGH 
THIS EVENING ACROSS MOST OF CENTRAL AND NORTH CENTRAL OKLAHOMA. 

LOCATION...
THE HIGH RISK AREA IS NORTH AND EAST OF A LINE FROM CENTRAHOMA... TO 
PAULS VALLEY... TO CHICKASHA... TO CHEROKEE. THERE IS ALSO A 
MODERATE RISK SOUTH AND WEST OF THE HIGH RISK AREA AND EAST OF A 
LINE FROM HENRIETTA TEXAS... TO HINTON... TO ALVA. AND... THERE IS A 
SLIGHT RISK WEST OF THE MODERATE RISK AND EAST OF A LINE FROM ARCHER 
CITY TEXAS... TO GRANDFIELD... TO WEATHERFORD... TO FREEDOM. 

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM 3 PM 
THROUGH MIDNIGHT.

IMPACTS...
THE POTENTIAL EXISTS FOR LARGE... STRONG... LONG-TRACK TORNADOES IN 
THE HIGH RISK AREA. DESTRUCTIVE HAIL... POSSIBLY LARGER THAN 
BASEBALLS... AND DAMAGING STRAIGHT LINE WINDS ALSO WILL BE POSSIBLE 
IN THE RISK AREAS. 

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS... EMERGENCY MANAGEMENT PERSONNEL... AND ALL 
EMERGENCY RESPONSE AGENCIES ARE ENCOURAGED TO MAINTAIN A HIGH STATE 
OF READINESS THROUGHOUT THE DAY... AND SHOULD BE PREPARED FOR A 
POSSIBLE OUTBREAK OF SEVERE WEATHER. PLAN FOR SEVERE WEATHER 
OPERATIONS AS SOON AS EARLY THIS AFTERNOON... AND POSSIBLY LASTING 
WELL INTO THE NIGHT. 

AN OUTBREAK OF SEVERE WEATHER IS EXPECTED. PEOPLE IN OKLAHOMA AND 
WESTERN NORTH TEXAS SHOULD PAY CLOSE ATTENTION TO WEATHER CONDITIONS 
TODAY AND LISTEN FOR LATER FORECASTS...WATCHES AND WARNINGS.

DISCUSSION...
OUTFLOW FROM THUNDERSTORMS LATE MONDAY SPREAD SOUTH ACROSS ALL OF  
OKLAHOMA OVERNIGHT. THE OUTFLOW BOUNDARY STALLED NEAR THE RED RIVER 
IN THE PRE-DAWN HOURS. THE STORMS THAT GENERATED THE BOUNDARY 
WEAKENED AND DISSIPATED DURING THE EVENING. AS A RESULT... THE 
OUTFLOW BOUNDARY ALSO WILL WEAKEN THIS MORNING. 

AN UNSEASONABLY STRONG UPPER-LEVEL STORM SYSTEM FOR LATE SPRING... 
LOCATED OVER ARIZONA EARLY THIS MORNING... WILL MOVE QUICKLY EAST 
AND WILL PUNCH INTO WESTERN OKLAHOMA BY EARLY EVENING. A SURFACE LOW 
WILL DEEPEN OVER SOUTHWESTERN KANSAS AHEAD OF THE UPPER SYSTEM. THE 
SURFACE LOW ALSO WILL BECOME VERY INTENSE FOR LATE MAY. THE 
STRENGTHENING LOW WILL PRODUCE STRONG SOUTH WINDS OVER THE AREA 
TODAY... WHICH WILL DRAW MOIST AND UNSTABLE AIR NORTHWARD OVER TEXAS 
AND OKLAHOMA. DAYTIME HEATING WILL LEAD TO STRONG TO EXTREME 
INSTABILITY THIS AFTERNOON... BY WHICH TIME A DRY LINE OVER WEST 
TEXAS WILL MOVE EAST INTO WESTERN OKLAHOMA. THE DRY LINE IS FORECAST 
TO BE NEAR THE WESTERN EDGE OF THE SLIGHT RISK AREA BY MID 
AFTERNOON. A CAPPING LAYER OF WARM AIR ALOFT IS LIKELY TO PREVENT 
THUNDERSTORMS UP TO THAT TIME... BUT LIFTING AND COOLING ALOFT WILL 
WEAKEN THE CAP ENOUGH TO ALLOW THUNDERSTORMS TO DEVELOP RAPIDLY NEAR 
AND EAST OF THE DRY LINE BY LATE AFTERNOON... PROBABLY AROUND 3 TO 5 
PM. STORMS ARE LIKELY TO INTENSIFY RAPIDLY BY EARLY EVENING. WITH 
VERY UNSTABLE CONDITIONS... AND STRONG WINDS AT ALL LEVELS AHEAD OF 
THE APPROACHING SYSTEM ALOFT... THE ENVIRONMENT WILL SUPPORT 
LONG-LIVED SUPERCELLS AND AN ATTENDANT RISK OF EXTREMELY LARGE HAIL 
AND DAMAGING WINDS. TORNADOES WILL BE LIKELY WITH THE MOST INTENSE 
STORMS... AND THE POTENTIAL WILL EXIST FOR ONE OR MORE LARGE 
LONG-TRACK TORNADOES IN THE HIGH RISK AREA. 

THE RISK OF SEVERE WEATHER WILL CONTINUE WELL INTO THE NIGHT... BUT 
SHOULD SHIFT INTO FAR EASTERN OKLAHOMA BY AROUND MIDNIGHT. 

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT WEDNESDAY MAY 25.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
HIGH WINDS...LOW HUMIDITIES AND WARM TEMPERATURES BEHIND THE DRY 
LINE WILL LEAD TO EXTREME WILDFIRE DANGER FOR FAR WESTERN OKLAHOMA 
AND WESTERN PARTS OF NORTH TEXAS THIS AFTERNOON. A RED FLAG WARNING 
IS IN EFFECT. PLEASE REFER TO THE LATEST VERSION OF THIS PRODUCT FOR 
MORE INFORMATION.

SUSTAINED WINDS MAY EXCEED 30 MPH... WITH FREQUENT GUSTS IN EXCESS 
OF 40 MPH... OVER WESTERN OKLAHOMA AND WESTERN NORTH TEXAS THIS 
AFTERNOON. A WIND ADVISORY MAY BE NEEDED. BLOWING DUST ALSO MAY 
REDUCE VISIBILITY AT TIMES IN FAR WESTERN OKLAHOMA AND WESTERN 
NORTH TEXAS. 

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THUNDERSTORM OUTLOOK...
THERE WILL BE A CHANCE OF THUNDERSTORMS ON WEDNESDAY OVER NORTHERN 
OKLAHOMA... BUT THE RISK OF SEVERE WEATHER WILL BE VERY LOW. THERE 
ALSO WILL BE A SLIGHT CHANCE OF THUNDERSTORMS IN CENTRAL AND EASTERN 
OKLAHOMA FRIDAY AND FRIDAY NIGHT. 

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY NOON TODAY. 
THERE ALSO WILL LIKELY BE A FEW UNSCHEDULED UPDATES... TO PROVIDE 
THE LATEST AVAILABLE INFORMATION AS THIS POTENTIALLY SIGNIFICANT 
SEVERE WEATHER EVENT UNFOLDS. 

$$

24



FLUS44 KOUN 241707
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1207 PM CDT TUE MAY 24 2011

OKZ004>048-050>052-TXZ083>090-251000-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1207 PM CDT TUE MAY 24 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A HIGH RISK OF SEVERE THUNDERSTORMS ACROSS MOST OF OKLAHOMA 
AND PARTS OF WESTERN NORTH TEXAS. 

LOCATION...
THE HIGH RISK AREA COVERS LOCATIONS NEAR AND EAST OF A LINE 
EXTENDING FROM ALVA...TO WEATHERFORD...TO WICHITA FALLS. THIS 
INCLUDES THE CITIES OF ALVA...ENID...PONCA CITY...THE OKLAHOMA CITY 
METRO...LAWTON...WICHITA FALLS...ARDMORE...ADA...AND DURANT. 

WEST OF THE HIGH RISK...THERE IS STILL A RISK OF SEVERE STORMS... AS 
FAR WEST AS WOODWARD...CLINTON...HOBART...FREDERICK...AND SEYMOUR.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM 3 PM 
THROUGH MIDNIGHT.

IMPACTS...
THE POTENTIAL EXISTS FOR VIOLENT TORNADOES...PRIMARILY IN THE HIGH 
RISK AREA. DESTRUCTIVE HAIL...POSSIBLY LARGER THAN BASEBALLS...AND 
DAMAGING STRAIGHT LINE WIND WILL ALSO BE POSSIBLE IN THE RISK AREAS.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS...EMERGENCY MANAGEMENT...AND ALL EMERGENCY 
RESPONSE AGENCIES ARE ENCOURAGED TO MAINTAIN A HIGH STATE OF 
READINESS THROUGHOUT THE DAY AND EVENING. THE PUBLIC SHOULD REVIEW 
SEVERE WEATHER SAFETY PLANS AND BE PREPARED TO TAKE ACTION. 

DISCUSSION...
A VERY STRONG UPPER-LEVEL STORM SYSTEM WILL MOVE QUICKLY OVER THE 
REGION TODAY AND TONIGHT. WITH VERY MOIST AND UNSTABLE AIR AHEAD OF 
THIS STORM...SIGNIFICANT SEVERE WEATHER IS EXPECTED. STORMS ARE 
EXPECTED TO DEVELOP BY MID-AFTERNOON JUST WEST OF THE HIGH RISK 
AREA...WITH STORM MOTIONS EASTERLY AT AROUND 30 MPH. WITH VERY 
UNSTABLE CONDITIONS...AND STRONG WINDS AT ALL LEVELS OF THE 
ATMOSPHERE...THE ENVIRONMENT WILL SUPPORT LONG-LIVED SUPERCELLS WITH 
THE RISK FOR GIANT HAIL AND DAMAGING WINDS. TORNADOES WILL BE LIKELY 
WITH THE MOST INTENSE STORMS...AND THE POTENTIAL WILL EXIST FOR ONE 
OR MORE VIOLENT...LONG-TRACK TORNADOES IN THE HIGH RISK AREA. 

THE RISK OF SEVERE WEATHER WILL CONTINUE WELL INTO THE NIGHT...BUT 
SHOULD SHIFT INTO FAR EASTERN OKLAHOMA BY AROUND MIDNIGHT. 

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT WEDNESDAY MAY 25.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
HIGH WINDS...LOW HUMIDITY... AND WARM TEMPERATURES BEHIND THE DRY 
LINE WILL LEAD TO EXTREME WILDFIRE DANGER FOR FAR WESTERN OKLAHOMA 
AND ADJACENT PARTS OF NORTH TEXAS THIS AFTERNOON. A RED FLAG WARNING 
IS IN EFFECT. PLEASE REFER TO THE LATEST VERSION OF THIS PRODUCT FOR 
MORE INFORMATION.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THUNDERSTORM OUTLOOK...
THERE WILL BE A CHANCE OF THUNDERSTORMS ON WEDNESDAY OVER NORTHERN 
OKLAHOMA...BUT THE RISK OF SEVERE WEATHER WILL BE VERY LOW. THERE 
ALSO WILL BE A SLIGHT CHANCE OF THUNDERSTORMS IN CENTRAL AND EASTERN 
OKLAHOMA FRIDAY AND FRIDAY NIGHT. SOME SEVERE STORMS WILL BE 
POSSIBLE.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM WEDNESDAY. 

$$



FLUS44 KOUN 242218
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
500 PM CDT TUE MAY 24 2011

OKZ004>048-050>052-TXZ083>090-251000-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
500 PM CDT TUE MAY 24 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A HIGH RISK OF SEVERE THUNDERSTORMS ACROSS CENTRAL AND 
SOUTHEAST OKLAHOMA AND PART OF WESTERN NORTH TEXAS. 

LOCATION...
THE HIGH RISK AREA COVERS LOCATIONS EAST OF A LINE FROM ALVA TO 
WICHITA FALLS. THIS INCLUDES THE CITIES OF ENID...PONCA CITY...THE 
OKLAHOMA CITY METRO...LAWTON...ARDMORE...ADA...AND DURANT. 

TIMING...
THE THREAT FOR SEVERE THUNDERSTORMS WILL CONTINUE THROUGH MIDNIGHT.

IMPACTS...
THE POTENTIAL FOR VIOLENT TORNADOES WILL CONTINUE INTO THE EVENING.  
DESTRUCTIVE HAIL...POSSIBLY LARGER THAN BASEBALLS...AND DAMAGING 
STRAIGHT LINE WIND WILL ALSO BE POSSIBLE IN THE RISK AREAS.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS...EMERGENCY MANAGEMENT...AND ALL EMERGENCY 
RESPONSE AGENCIES ARE ENCOURAGED TO MAINTAIN A HIGH STATE OF 
READINESS THROUGHOUT THE EVENING. THE PUBLIC SHOULD REVIEW SEVERE 
WEATHER SAFETY PLANS AND BE PREPARED TO TAKE ACTION. 

DISCUSSION...
SEVERE THUNDERSTORMS DEVELOPED DURING THE AFTERNOON OVER WESTERN 
OKLAHOMA AND BY EARLY EVENING HAD MOVED INTO CENTRAL OKLAHOMA. 
A VERY STRONG UPPER-LEVEL STORM SYSTEM WILL MOVE QUICKLY OVER THE 
REGION THROUGH TONIGHT. WITH VERY MOIST AND UNSTABLE AIR AHEAD OF 
THIS STORM...SIGNIFICANT SEVERE WEATHER WILL CONTINUE INTO THE 
EVENING. WITH VERY UNSTABLE CONDITIONS...AND STRONG WINDS AT ALL 
LEVELS OF THE ATMOSPHERE...THE ENVIRONMENT WILL SUPPORT LONG-LIVED 
SUPERCELLS WITH THE RISK FOR TORNADOES. GIANT HAIL AND DAMAGING 
WINDS CAN ALSO BE EXPECTED. 

THE RISK OF SEVERE WEATHER WILL CONTINUE WELL INTO THE NIGHT...BUT 
SHOULD SHIFT INTO FAR EASTERN OKLAHOMA BY AROUND MIDNIGHT. 

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT WEDNESDAY MAY 25.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
HIGH WINDS...LOW HUMIDITY... AND WARM TEMPERATURES BEHIND THE DRY 
LINE WILL LEAD TO EXTREME WILDFIRE DANGER FOR FAR WESTERN OKLAHOMA 
AND ADJACENT PARTS OF NORTH TEXAS THROUGH MID EVENING. A RED FLAG 
WARNING IS IN EFFECT. PLEASE REFER TO THE LATEST VERSION OF THIS 
PRODUCT FOR MORE INFORMATION.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THUNDERSTORM OUTLOOK...
THERE WILL BE A CHANCE OF THUNDERSTORMS ON WEDNESDAY OVER NORTHERN 
OKLAHOMA...BUT THE RISK OF SEVERE WEATHER WILL BE VERY LOW. THERE 
ALSO WILL BE A SLIGHT CHANCE OF THUNDERSTORMS IN CENTRAL AND EASTERN 
OKLAHOMA FRIDAY AND FRIDAY NIGHT. SOME SEVERE STORMS WILL BE 
POSSIBLE.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM WEDNESDAY. 

$$



FLUS44 KOUN 250011
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
700 PM CDT TUE MAY 24 2011

OKZ004>048-050>052-TXZ083>090-251000-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
700 PM CDT TUE MAY 24 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A HIGH RISK OF SEVERE THUNDERSTORMS ACROSS CENTRAL AND 
SOUTHEAST OKLAHOMA. 

LOCATION...
THE HIGH RISK AREA COVERS LOCATIONS EAST OF A LINE FROM 
STILLWATER... TO CHOCTAW... TO RINGLING. THIS INCLUDES THE CITIES OF 
SHAWNEE...ARDMORE...ADA...AND DURANT. 

TIMING...
THE THREAT FOR SEVERE THUNDERSTORMS WILL CONTINUE THROUGH MIDNIGHT.

IMPACTS...
THE POTENTIAL FOR VIOLENT TORNADOES WILL CONTINUE THIS EVENING.  
DESTRUCTIVE HAIL...POSSIBLY LARGER THAN BASEBALLS...AND DAMAGING 
STRAIGHT LINE WIND WILL ALSO BE POSSIBLE IN THE RISK AREA.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS...EMERGENCY MANAGEMENT...AND ALL EMERGENCY 
RESPONSE AGENCIES ARE ENCOURAGED TO MAINTAIN A HIGH STATE OF 
READINESS THROUGHOUT THE EVENING. THE PUBLIC SHOULD REVIEW SEVERE 
WEATHER SAFETY PLANS AND BE PREPARED TO TAKE ACTION. 

DISCUSSION...
SEVERE THUNDERSTORMS CONTINUE THIS EVENING OVER PARTS OF CENTRAL AND 
SOUTHEAST OKLAHOMA. VERY MOIST AND UNSTABLE AIR REMAINS IN PLACE 
OVER MUCH OF THE EASTERN HALF OF OKLAHOMA...AND SIGNIFICANT SEVERE 
WEATHER WILL CONTINUE INTO THE EVENING. WITH VERY UNSTABLE 
CONDITIONS...AND STRONG WINDS AT ALL LEVELS OF THE ATMOSPHERE...THE 
ENVIRONMENT WILL SUPPORT LONG-LIVED SUPERCELLS WITH A CONTINUED RISK 
FOR TORNADOES. GIANT HAIL AND DAMAGING WINDS CAN ALSO BE EXPECTED. 

THE RISK OF SEVERE WEATHER WILL CONTINUE WELL INTO THE 
EVENING...MAINLY EAST OF I-35...BUT SHOULD SHIFT INTO FAR EASTERN 
OKLAHOMA BY AROUND MIDNIGHT. 

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT WEDNESDAY MAY 25.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
HIGH WINDS...LOW HUMIDITY... AND WARM TEMPERATURES BEHIND THE DRY 
LINE WILL LEAD TO EXTREME WILDFIRE DANGER FOR FAR WESTERN OKLAHOMA 
AND ADJACENT PARTS OF NORTH TEXAS THROUGH MID EVENING. A RED FLAG 
WARNING IS IN EFFECT. PLEASE REFER TO THE LATEST VERSION OF THIS 
PRODUCT FOR MORE INFORMATION.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THUNDERSTORM OUTLOOK...
THERE WILL BE A CHANCE OF THUNDERSTORMS ON WEDNESDAY OVER NORTHERN 
OKLAHOMA...BUT THE RISK OF SEVERE WEATHER WILL BE VERY LOW. THERE 
ALSO WILL BE A SLIGHT CHANCE OF THUNDERSTORMS IN CENTRAL AND EASTERN 
OKLAHOMA FRIDAY AND FRIDAY NIGHT. SOME SEVERE STORMS WILL BE 
POSSIBLE.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM WEDNESDAY. 

$$




FLUS44 KOUN 250151
HWOOUN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
830 PM CDT TUE MAY 24 2011

OKZ004>048-050>052-TXZ083>090-251000-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
830 PM CDT TUE MAY 24 2011

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS SOUTHEAST OF A 
MADILL TO HOLDENVILLE LINE. THERE IS A SLIGHT RISK WEST OF THE 
MODERATE RISK AREA AND EAST OF A MEDFORD TO STILLWATER TO ARDMORE 
LINE.   

TIMING...
THE THREAT FOR SEVERE THUNDERSTORMS WILL CONTINUE THROUGH MIDNIGHT.

IMPACTS...
THE GREATEST POTENTIAL FOR TORNADOES THIS EVENING WILL REMAIN MAINLY 
SOUTHEAST OF A HOLDENVILLE TO MADILL LINE.

DESTRUCTIVE HAIL...POSSIBLY LARGER THAN BASEBALLS...AND DAMAGING 
STRAIGHT LINE WIND WILL ALSO BE POSSIBLE IN THE RISK AREA.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGERS...ESPECIALLY IN 
SOUTHEAST OKLAHOMA...SHOULD REMAIN PREPARED FOR SEVERE WEATHER 
OPERATIONS THROUGH THE EVENING. 

DISCUSSION...
SEVERE THUNDERSTORMS WILL CONTINUE THROUGH THE EVENING...MAINLY OVER 
PARTS OF SOUTHEAST OKLAHOMA. VERY MOIST AND UNSTABLE AIR REMAINS IN 
PLACE OVER SOUTHEAST OKLAHOMA...AND SIGNIFICANT SEVERE WEATHER 
WILL CONTINUE INTO THE EVENING. WITH VERY UNSTABLE CONDITIONS...AND 
STRONG WINDS AT ALL LEVELS OF THE ATMOSPHERE...THE ENVIRONMENT WILL 
SUPPORT LONG-LIVED SUPERCELLS WITH A CONTINUED RISK FOR TORNADOES. 
GIANT HAIL AND DAMAGING WINDS CAN ALSO BE EXPECTED. 

THE RISK OF SEVERE WEATHER WILL SHIFT INTO FAR EASTERN OKLAHOMA BY 
AROUND MIDNIGHT. 

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT WEDNESDAY MAY 25.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THUNDERSTORM OUTLOOK...
THERE WILL BE A CHANCE OF THUNDERSTORMS ON WEDNESDAY OVER NORTHERN 
OKLAHOMA...BUT THE RISK OF SEVERE WEATHER WILL BE VERY LOW. THERE 
ALSO WILL BE A SLIGHT CHANCE OF THUNDERSTORMS IN CENTRAL AND EASTERN 
OKLAHOMA FRIDAY AND FRIDAY NIGHT. SOME SEVERE STORMS WILL BE 
POSSIBLE.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM WEDNESDAY. 

$$