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WWUS20 KWNS 021751

SEL8

SPC WW 021751

ARZ000-LAZ000-MSZ000-CWZ000-030100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 128

NWS STORM PREDICTION CENTER NORMAN OK

1250 PM CDT MON APR 2 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR SOUTHEAST ARKANSAS

       EASTERN LOUISIANA

       SOUTHWEST AND WEST-CENTRAL MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL

800 PM CDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH

NORTHEAST OF MONROE LOUISIANA TO 55 MILES SOUTH SOUTHEAST OF

SLIDELL LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 126...WW 127...



DISCUSSION...BOWING MCS OVER LA IS IN THE PROCESS OF INTENSIFYING

THIS AFTERNOON AS IT ENCOUNTERS A MOIST AND MODERATE-STRONGLY

UNSTABLE AIR MASS WITH MLCAPE OF 2000-3000 J/KG. MID AND HIGH-LEVEL

WIND FIELD WILL REMAIN RATHER WEAK...BUT THE COMBINATION OF A

VIGOROUS COLD POOL AND 50+ KT REAR-INFLOW JET /PER LCH VAD/ WILL

CONTINUE TO ENHANCE UPDRAFT GROWTH ON LEADING EDGE OF GUST FRONT.

DAMAGING WINDS WILL BE THE PRIMARY HAZARD...THOUGH SEVERE HAIL IS

ALSO POSSIBLE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 24035.





...MEAD

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