[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 162157
SEL6
SPC WW 162157
GAZ000-NCZ000-SCZ000-TNZ000-VAZ000-170500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 436
NWS STORM PREDICTION CENTER NORMAN OK
555 PM EDT TUE JUN 16 2009

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

       EXTREME NORTHEAST GEORGIA
       WESTERN NORTH CAROLINA
       UPSTATE SOUTH CAROLINA
       EASTERN TENNESSEE
       WESTERN VIRGINIA

EFFECTIVE THIS TUESDAY AFTERNOON AND WEDNESDAY MORNING FROM 555
PM UNTIL 100 AM 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 80
STATUTE MILES EITHER SIDE OF A LINE FROM 15 MILES SOUTH SOUTHWEST
OF CHARLOTTE NORTH CAROLINA TO 55 MILES NORTH NORTHEAST OF
KNOXVILLE TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).

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 433...WW 434...WW 435...

DISCUSSION...WELL-DEFINED BOW ECHO WITH DAMAGING WINDS IS MOVING EWD
ALONG THE SE KY/NE TN BORDER AT ABOUT 45 KT.  THIS SYSTEM MAY TEND
TO PROPAGATE MORE ESEWD OVER THE NEXT FEW HOURS AS IT ENCOUNTERS AN
INSTABILITY GRADIENT WITH COOLER/MORE STABLE AIR FARTHER TO THE E IN
NC/VA.  MEANWHILE...MORE ISOLATED STORMS ARE ONGOING ACROSS SC ALONG
THE SAME INSTABILITY GRADIENT.  VERTICAL SHEAR AND INSTABILITY ARE
AT LEAST MARGINALLY FAVORABLE FOR SUPERCELLS ACROSS SC...WITH LARGE
HAIL THE MAIN THREAT.

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 28040.


...THOMPSON
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