WATCHES: Severe Thunderstorm Watch Number 812

WWUS20 KWNS 071532
SEL2
SPC WW 071532
ALZ000-GAZ000-NCZ000-SCZ000-TNZ000-072200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 812
NWS STORM PREDICTION CENTER NORMAN OK
1030 AM CDT THU AUG 7 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

NORTHERN AND CENTRAL ALABAMA
NORTHERN AND CENTRAL GEORGIA
EXTREME WESTERN NORTH CAROLINA
EXTREME WESTERN SOUTH CAROLINA
FAR SRN MIDDLE AND ERN TENNESSEE

EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 1030 AM UNTIL
500 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 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES SOUTHWEST
OF HUNTSVILLE ALABAMA TO 10 MILES SOUTH SOUTHEAST OF ANDERSON
SOUTH CAROLINA. 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...CLUSTER OF STORMS MOVING ESEWD ACROSS SRN TN/FAR NWRN
AL ARE EXPECTED TO INTENSIFY AS THEY MOVE INTO A WARMING AND
DESTABILIZING AIR MASS. POSSIBLE DEVELOPMENT OF A COLD POOL AND MID
LEVEL WLY WINDS INCREASING TO 30 KT SUGGESTS THAT WIND DAMAGE WILL
BE THE PRIMARY THREAT. ALSO...OTHER STORMS WITH SEVERE HAIL/WINDS
ARE EXPECTED TO DEVELOP THROUGH THE AFTERNOON AS A COLD FRONT MOVES
SLOWLY SWD INTO THE REGION.

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 29025.

...IMY

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