A Review of the NWS Birmingham's Hazarous Weather Outlooks
Leading Up to April 27, 2011


Wednesday, April 20th 
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
713 PM CDT WED APR 20 2011

ALZ011>015-017>050-211130-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
713 PM CDT WED APR 20 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...TONIGHT.

STRONG TO SEVERE THUNDERSTORMS PRODUCING HAIL AND GUSTY WINDS WILL
BE POSSIBLE NEAR AND WEST OF A LINE FROM JASPER TO BIRMINGHAM TO
MARION. THE OVERALL TORNADO THREAT IS LOW. ADDITIONAL SHOWERS AND
THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL ACROSS THE NORTHERN TWO
THIRDS OF THE AREA...SO SOME FLOODING IS POSSIBLE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

ISOLATED STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO BE POSSIBLE
THROUGH THURSDAY AFTERNOON.  THE MAIN SEVERE WEATHER THREAT WILL BE
DAMAGING WINDS...WITH A LESSER THREAT OF LARGE HAIL. OVERALL TORNADO
THREAT SHOULD REMAIN LOW THROUGH THURSDAY.

STRONG TO SEVERE THUNDERSTORMS WILL AGAIN BE POSSIBLE FOR TUESDAY...
AHEAD OF A SURFACE FRONT. CONFIDENCE REMAINS LOW AT THIS TIME DUE TO
TIMING INCONSISTENCIES ONLY...AND NOT DUE TO ANY LACK OF OVERALL
FORCING AND INSTABILITY.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE NEEDED
THROUGH TONIGHT DUE TO THE POSSIBILITY OF SEVERE STORMS.

$$

75

 
 
Thursday, April 21st 
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
545 AM CDT THU APR 21 2011

ALZ011>015-017>050-221046-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
545 AM CDT THU APR 21 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...TODAY AND TONIGHT.

ANOTHER ROUND OF STRONG TO SEVERE STORMS WILL BE POSSIBLE BOTH THIS
MORNING AND THIS AFTERNOON FOR AREAS BASICALLY ALONG AND NORTH OF A
LINE FROM CUBA...TO CLANTON...TO ROANOKE.  THE MAIN THREATS WITH
ANY OF THESE STORMS WILL BE STRONG STRAIGHT LINE WINDS AND
MARGINALLY SEVERE HAIL.  ADDITIONALLY...LOCALLY HEAVY RAINFALL IS
POSSIBLE FOR THE SAME AREA.  A FLASH FLOOD WATCH HAS BEEN ISSUED
THROUGH 7 PM THIS EVENING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

STRONG TO SEVERE THUNDERSTORMS WILL AGAIN BE POSSIBLE TUESDAY OR
WEDNESDAY OF NEXT WEEK AHEAD OF A DEVELOPING SURFACE FRONT.
CONFIDENCE IS LOW AT THIS TIME FOR TUESDAY...BUT HAS INCREASED FOR
THE PASSAGE OF THE FRONT ON WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE NEEDED
TODAY DUE TO THE POSSIBILITY OF SEVERE STORMS AND LOCALIZED FLOODING.

$$

27

 
 
Friday, April 22nd 
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
649 AM CDT FRI APR 22 2011

ALZ011>015-017>050-231156-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
649 AM CDT FRI APR 22 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...TODAY AND TONIGHT.

MINOR RIVER FLOODING WILL CONTINUE ON PORTIONS OF THE TOMBIGBEE AND
WARRIOR RIVERS. PLEASE SEE THE LATEST RIVER STATEMENTS FOR DETAILS ON
FLOODING.

OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

MINOR RIVER FLOODING IS FORECAST ALONG SECTIONS OF THE TOMBIGBEE AND
WARRIOR RIVERS THROUGH MONDAY. PLEASE SEE THE LATEST RIVER
STATEMENTS FOR DETAILS ON FLOODING.

BREEZY CONDITION ARE POSSIBLE ON TUESDAY AND WEDNESDAY AHEAD OF THE
NEXT WEATHER SYSTEM.

STRONG TO SEVERE THUNDERSTORMS WILL AGAIN BE POSSIBLE TUESDAY AND
WEDNESDAY OF NEXT WEEK AHEAD OF A DEVELOPING SURFACE FRONT.
CONFIDENCE IS LOW AT THIS TIME FOR TUESDAY... BUT CONFIDENCE HAS
INCREASED FOR WEDNESDAY...WHEN THERE MAY BE A THREAT OF TORNADOES.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE NEEDED
NEXT TUESDAY OR WEDNESDAY DUE TO THE POSSIBILITY OF SEVERE STORMS.

$$

27

 
 
Saturday, April 23rd 
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
720 AM CDT SAT APR 23 2011

ALZ011>015-017>050-241200-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
720 AM CDT SAT APR 23 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...TODAY AND TONIGHT.

MINOR RIVER FLOODING WILL CONTINUE ON SECTIONS OF THE TOMBIGBEE
RIVER. PLEASE SEE THE LATEST RIVER STATEMENTS FOR DETAILS ON
FLOODING.

OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

MINOR RIVER FLOODING IS FORECAST ALONG SECTIONS OF THE TOMBIGBEE
RIVER THROUGH SUNDAY. PLEASE SEE THE LATEST RIVER STATEMENTS
FOR DETAILS ON FLOODING.

BREEZY CONDITION ARE POSSIBLE ON TUESDAY AND WEDNESDAY AHEAD OF THE
NEXT WEATHER SYSTEM.

STRONG TO SEVERE THUNDERSTORMS WILL AGAIN BE POSSIBLE TUESDAY AND
WEDNESDAY OF NEXT WEEK AHEAD OF A DEVELOPING SURFACE FRONT.
CONFIDENCE IS LOW AT THIS TIME FOR TUESDAY...BUT CONFIDENCE HAS
INCREASED FOR WEDNESDAY...WHEN THERE MAY BE A THREAT OF TORNADOES.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE NEEDED
NEXT TUESDAY AND WEDNESDAY DUE TO THE POSSIBILITY OF SEVERE STORMS.

$$

08/MNK

 
 
Sunday, April 24th 
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
700 AM CDT SUN APR 24 2011

ALZ011>015-017>050-251200-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
700 AM CDT SUN APR 24 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

SEVERE THUNDERSTORMS WILL BE POSSIBLE TUESDAY...MAINLY ACROSS THE
NORTHWESTERN COUNTIES...AND THEN AGAIN ON WEDNESDAY FOR THE ENTIRE
AREA AS THE NEXT STORM SYSTEM MOVES THROUGH. CONFIDENCE IS SLOWLY
INCREASING FOR THESE EVENTS WITH DAMAGING STRAIGHT LINE WINDS
EXPECTED TO BE THE MAIN THREAT ON TUESDAY. ALL MODES OF SEVERE
WEATHER ARE POSSIBLE ON WEDNESDAY...INCLUDING TORNADOES...STRAIGHT
LINE WINDS...LARGE HAIL AND LOCALLY HEAVY RAIN.

STRONG GRADIENT WINDS ARE ALSO EXPECTED DURING THE DAY WEDNESDAY
AHEAD OF FRONT AND OUTSIDE OF THUNDERSTORM ACTIVITY. SUSTAINED WINDS
OF 15 TO 25 MPH ALONG WITH HIGHER GUSTS UP TO 35 MPH ARE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE NEEDED
NEXT TUESDAY AND WEDNESDAY DUE TO THE POSSIBILITY OF SEVERE STORMS.

$$

08/MNK

 
 
Monday, April 25th 
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
557 AM CDT MON APR 25 2011

ALZ011>015-017>050-260100-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
557 AM CDT MON APR 25 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...TODAY AND TONIGHT.

A SQUALL LINE WILL MOVE INTO NORTHWEST ALABAMA LATE TONIGHT.  THE
SQUALL LINE WILL LIKELY BE IN A WEAKENING TREND AS IT MOVES INTO
NORTHWEST ALABAMA BETWEEN 3 AM AND 6 AM...BUT IT MAY BE STRONG ENOUGH
TO PRODUCE DAMAGING STRAIGHT LINE WINDS AND PERHAPS AN ISOLATED
TORNADO.

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

A WEAKENING SQUALL LINE WILL MOVE ACROSS NORTHWEST ALABAMA TUESDAY
MORNING.  THE SQUALL LINE COULD PRODUCE DAMAGING STRAIGHT LINE
WINDS...VERY HEAVY RAINFALL...AND AN ISOLATED TORNADO...MAINLY
WEST OF A MILLPORT TO DOUBLE SPRINGS LINE. THE OUTFLOW FROM THE
SQUALL LINE WILL LEAVE A BOUNDARY FOR ADDITIONAL SEVERE STORM
DEVELOPMENT DURING THE AFTERNOON.

THE STRONGEST PART OF THE STORM SYSTEM WILL MOVE THROUGH ON
WEDNESDAY. DISCRETE STORMS MAY DEVELOP DURING THE AFTERNOON HOURS...
MAINLY AFTER 2 PM WEST OF INTERSTATE 65...AND THEN TRANSITION INTO
MORE OF A SQUALL LINE THAT WILL PUSH ACROSS THE AREA IN THE EVENING
AND OVERNIGHT HOURS. ALL MODES OF SEVERE WEATHER ARE POSSIBLE ON
WEDNESDAY...INCLUDING TORNADOES...STRAIGHT LINE WINDS...LARGE HAIL
AND HEAVY RAIN.

STRONG GRADIENT WINDS ARE ALSO EXPECTED DURING THE DAY TUESDAY AND
WEDNESDAY.  SUSTAINED WINDS OF 15 TO 25 MPH ALONG WITH HIGHER GUSTS
UP TO 35 MPH ARE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE NEEDED
TUESDAY AND WEDNESDAY DUE TO THE POSSIBILITY OF SEVERE STORMS.

$$

 
 
Tuesday, April 26th 
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
554 AM CDT TUE APR 26 2011

ALZ011>015-017>050-270100-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
554 AM CDT TUE APR 26 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...TODAY AND TONIGHT.

ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE TODAY PRODUCING
DAMAGING STRAIGHT LINE WINDS AND LARGE HAIL. THE SEVERE THREAT WILL
BE MAINLY BETWEEN 12 NOON AND 8 PM. THE THREAT OF TORNADOES TODAY IS
RELATIVELY LOW...BUT NOT ZERO.

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

ON WEDNESDAY...THE THREAT OF TORNADOES AND DAMAGING WINDS
INCREASES.  SUPERCELL THUNDERSTORMS...CAPABLE OF PRODUCING STRONG
AND LONG TRACKED TORNADOES...ARE LIKELY TO DEVELOP AND TRACK ACROSS
CENTRAL ALABAMA IN THE AFTERNOON AND EVENING.  THE AREA WITH THE
GREATEST TORNADO THREAT IS FROM THE CITIES OF DEMOPOLIS...CLANTON...
SYLACAUGA...AND ANNISTON...NORTHWARD. THE SEVERE WEATHER THREAT WILL
END FROM WEST TO EAST WEDNESDAY EVENING...AS THE COLD FRONT FINALLY
MOVES THROUGH.

EVEN OUTSIDE OF THUNDERSTORM AREAS...STRONG GRADIENT WINDS ARE ALSO
EXPECTED ON WEDNESDAY.  SUSTAINED WINDS OF 15 TO 25 MPH ALONG WITH
HIGHER GUSTS UP TO 35 MPH.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE NEEDED
TODAY...AND LIKELY ON WEDNESDAY...DUE TO THE SEVERE THUNDERSTORM
THREAT.

$$

 
 
Wednesday, April 27th 
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
319 AM CDT WED APR 27 2011

ALZ011>015-017>050-280830-
MARION-LAMAR-FAYETTE-WINSTON-WALKER-BLOUNT-ETOWAH-CALHOUN-
CHEROKEE-CLEBURNE-PICKENS-TUSCALOOSA-JEFFERSON-SHELBY-ST. CLAIR-
TALLADEGA-CLAY-RANDOLPH-SUMTER-GREENE-HALE-PERRY-BIBB-CHILTON-
COOSA-TALLAPOOSA-CHAMBERS-MARENGO-DALLAS-AUTAUGA-LOWNDES-ELMORE-
MONTGOMERY-MACON-BULLOCK-LEE-RUSSELL-PIKE-BARBOUR-
319 AM CDT WED APR 27 2011

...SIGNIFICANT SEVERE WEATHER OUTBREAK EXPECTED TODAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...TODAY AND TONIGHT.

A SEVERE WEATHER OUTBREAK IS LIKELY TODAY FOR ALL OF CENTRAL
ALABAMA. STRONG...LONG LIVED TORNADOES...DAMAGING WINDS...AND
VERY LARGE HAIL ARE ALL POSSIBLE. THE GREATEST THREAT THROUGH NOON
WILL BE AREAS WEST OF 65 AND NORTH OF INTERSTATE 20. THE THREAT
WILL THEN EXTEND ACROSS ALL OF CENTRAL ALABAMA DURING THE
AFTERNOON AND CONTINUE AT LEAST THROUGH MIDNIGHT.

NOW IS THE TIME TO REVIEW YOUR SEVERE WEATHER ACTION PLAN AND BE
PREPARED TO TAKE QUICK ACTION WHEN WATCHES AND WARNINGS ARE
EVENTUALLY ISSUED. THERE ARE STILL SOME TIMING ISSUES TO BE DEALT
WITH...SO BE PREPARED FOR SOME ADJUSTMENTS IN TIMING AND MONITOR
THE LATEST FORECAST FOR UPDATED INFORMATION.

LOCALIZED TORRENTIAL RAINFALL IS ALSO POSSIBLE TODAY AND TONIGHT.
A FEW INCHES OF RAINFALL MAY OCCUR IN A SHORT PERIOD OF TIME.
ADDITIONALLY...MORE THAN ONE STORM MAY AFFECT THE SAME AREA. THIS
MAY PRODUCE SOME LOCALIZED FLASH FLOODING.

EVEN OUTSIDE OF THUNDERSTORM AREAS...STRONG GRADIENT WINDS ARE ALSO
EXPECTED. SUSTAINED WINDS OF 15 TO 25 MPH ALONG WITH HIGHER GUSTS
UP TO 35 MPH ARE EXPECTED.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT WILL BE
NEEDED TODAY AND TONIGHT.

$$

 

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