

000 

WWUS20 KWNS 211832

SEL2

SPC WW 211832

ALZ000-FLZ000-GAZ000-CWZ000-220200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 332

NWS STORM PREDICTION CENTER NORMAN OK

230 PM EDT WED MAY 21 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR SOUTHEASTERN ALABAMA

       NORTHERN FLORIDA

       SOUTHEASTERN GEORGIA

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 230 PM UNTIL

1000 PM EDT.



HAIL TO 2 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES SOUTHWEST

OF CRESTVIEW FLORIDA TO 25 MILES EAST NORTHEAST OF BRUNSWICK

GEORGIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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.



DISCUSSION...CONVECTION HAS RECENTLY DEVELOPED NEAR QUASI-STATIONARY

FRONT AS TEMPERATURES WARMED INTO THE UPPER 80S. MLCAPES AROUND 2000

J/KG AND DEEP LAYER SHEAR NEAR 40 KT ARE FAVORABLE FOR SEVERE

STORMS. HAIL SHOULD BE THE MAIN THREAT...GIVEN THE AMOUNT OF

INSTABILITY AND STEEP MID LEVEL LAPSE RATES. HOWEVER...

UNIDIRECTIONAL WLY WINDS INCREASING WITH HEIGHT MAY RESULT IN SHORT

LINE SEGMENTS WITH WIND DAMAGE.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 29025.





...IMY

