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427 

WWUS20 KWNS 061736

SEL5

SPC WW 061736

ALZ000-LAZ000-MSZ000-070000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 255

NWS STORM PREDICTION CENTER NORMAN OK

1235 PM CDT WED MAY 6 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF SOUTHWEST ALABAMA

       PARTS OF NORTHEAST LOUISIANA

       PARTS OF CENTRAL AND SOUTHERN MISSISSIPPI



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1235 PM UNTIL

700 PM CDT.



HAIL TO 2.5 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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 5 MILES EAST OF

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 252...WW 254...



DISCUSSION...E/W LINE OF STRONG/SEVERE THUNDERSTORMS ACROSS NRN

PORTION OF WATCH WILL LIKELY INCREASE IN INTENSITY WITH CONTINUED

HEATING/DESTABILIZATION IN WARM SECTOR.  30-40KT OF DEEP LAYER SHEAR

SUPPORTS DEVELOPMENT OF SHORT LINE SEGMENTS AND ISOLATED SUPERCELLS

ENHANCING SEVERE THREAT. ACTIVITY SHOULD WORK SLOWLY SWD THRU THE

AFTERNOON.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 24025.





...HALES

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