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361
FLUS44 KSHV 211107
HWOSHV

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
607 AM CDT TUE MAY 21 2013

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-211700-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
COLUMBIA-UNION AR-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-
UNION LA-DE SOTO-RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA-
NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE-MCCURTAIN-BOWIE-
FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-GREGG-
HARRISON-CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA-
SAN AUGUSTINE-SABINE TX-
607 AM CDT TUE MAY 21 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA...
NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND
NORTHEAST TEXAS.

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

THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS TODAY ACROSS MUCH
OF EAST TEXAS...SOUTHEAST OKLAHOMA...SOUTHWEST ARKANSAS...AND
NORTHWEST LOUISIANA. AN UPPER LEVEL TROUGH OF LOW PRESSURE WILL
SHIFT EAST ACROSS THE SOUTHERN PLAINS TODAY AND INTERACT WITH
STRONG INSTABILITY THAT WILL DEVELOP WITH DAYTIME HEATING...AND
VARIOUS CONVECTIVE BOUNDARIES LEFT IN PLACE FROM SHOWERS AND
THUNDERSTORMS THAT DEVELOPED MONDAY NIGHT AND THIS MORNING ACROSS
SOUTHEAST OKLAHOMA AND SOUTHWEST ARKANSAS. SCATTERED SHOWERS AND
THUNDERSTORMS SHOULD INCREASE BY THIS AFTERNOON OVER NORTHEAST
TEXAS...SOUTHEAST OKLAHOMA...AND SOUTHWEST ARKANSAS AHEAD OF THE
TROUGH...OVER AREAS THAT WILL CONTAIN STRONG INSTABILITY AT THE
SURFACE AND ALOFT. STRONG WIND SHEAR WILL ALSO AID IN UPDRAFT
ROTATION...SUCH THAT SOME OF THESE STORMS WILL BECOME
SEVERE...CAPABLE OF PRODUCING DAMAGING WINDS...LARGE HAIL...AND
ISOLATED TORNADOES. THESE STORMS WILL ALSO PRODUCE LOCALLY HEAVY
RAINFALL AT TIMES...WITH ONE TO THREE INCHES OF RAIN POSSIBLE
ACROSS NORTHEAST TEXAS...SOUTHEAST OKLAHOMA...SOUTHWEST ARKANSAS
AND NORTHWEST LOUISIANA. THESE STORMS SHOULD CONSOLIDATE INTO A
LARGE THUNDERSTORM COMPLEX TONIGHT AS IT PROPAGATES EAST SOUTHEAST
ACROSS SOUTHWEST ARKANSAS AND NORTH LOUISIANA...WHERE STRONG
DAMAGING WINDS WILL BE POSSIBLE. THESE SHOWERS AND THUNDERSTORMS
SHOULD WEAKEN LATE TONIGHT OVER NORTHCENTRAL LOUISIANA AS
INSTABILITY GRADUALLY DIMINISHES.

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

SHOWERS AND THUNDERSTORMS SHOULD BE ONGOING WEDNESDAY MORNING
ACROSS NORTHCENTRAL LOUISIANA AND PORTIONS OF DEEP EAST
TEXAS...BUT SHOULD DIMINISH FROM WEST TO EAST BY LATE MORNING
WITH THE DEPARTURE OF THE UPPER TROUGH. ISOLATED SHOWERS AND
THUNDERSTORMS MAY REDEVELOP WEDNESDAY AFTERNOON MAINLY SOUTH OF
INTERSTATE 20 OVER EAST TEXAS AND NORTH LOUISIANA...WHERE A WEAK
SURFACE BOUNDARY BECOMES STATIONARY OVER THESE AREAS. THESE SHOULD
DIMINISH WEDNESDAY EVENING WITH THE LOSS OF HEATING.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGERS...SKYWARN NETWORKS...AND AMATEUR
RADIO PERSONNEL...WILL BE REQUIRED LATER TODAY AND TONIGHT.

$$

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