[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 022234
SEL0
SPC WW 022234
ALZ000-GAZ000-NCZ000-TNZ000-030400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 610
NWS STORM PREDICTION CENTER NORMAN OK
635 PM EDT SUN SEP 2 2012

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

       EASTERN AND CENTRAL ALABAMA
       NORTHWEST GEORGIA
       FAR WESTERN NORTH CAROLINA
       SOUTHEAST TENNESSEE

EFFECTIVE THIS SUNDAY NIGHT FROM 635 PM UNTIL MIDNIGHT EDT.

HAIL TO 1 INCH 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 EAST AND WEST OF A LINE FROM 60 MILES NORTHEAST OF
CHATTANOOGA TENNESSEE TO ANNISTON ALABAMA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU0).

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 608...WW 609...

DISCUSSION...CURRENT TRENDS IN RADAR DATA INDICATE THAT STORMS OVER
NRN AL ARE EVOLVING INTO A QLCS WITH GENERAL EWD MOTION OF AROUND 30
KT.  A GROWING/DEEPENING COLD POOL SHOULD EVENTUALLY ALLOW FOR MORE
OF A SEWD PROPAGATION TO CONVECTIVE SYSTEM AS A HOT AND MOIST
BOUNDARY LAYER WITH MLCAPE OF 1000-2000 J/KG IS ENTRAINED ALONG
LEADING GUST FRONT.  WHILE A BRIEF TORNADO IS POSSIBLE...IT APPEARS
THAT DAMAGING WINDS WILL BE THE PRIMARY SEVERE WEATHER HAZARD.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION
VECTOR 27030.


...MEAD


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