[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 021527
SEL6
SPC WW 021527
ALZ000-GAZ000-TNZ000-022100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 56
NWS STORM PREDICTION CENTER NORMAN OK
930 AM CST FRI MAR 2 2012

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

       NORTHERN ALABAMA
       NORTHWEST GEORGIA
       MIDDLE AND EASTERN TENNESSEE

EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 930 AM UNTIL 300
PM CST.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHEAST OF
CROSSVILLE TENNESSEE TO 35 MILES SOUTHEAST OF HUNTSVILLE ALABAMA.
 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU6).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 55...

DISCUSSION...A NE-SW ORIENTED BAND OF TSTMS HAS RECENTLY INTENSIFIED
WITH A COUPLE OF CELLS SHOWING SIGNS OF ROTATION.  MODIFICATION OF
12Z BNA AND HUNTSVILLE SOUNDINGS FOR CURRENT SURFACE CONDITIONS
INDICATES THAT THE AIR MASS IS UNCAPPED WITH MLCAPE VALUES OF
500-1000 J/KG.  GIVEN THE PRESENCE OF THE STRONG VERTICAL
SHEAR...THE SETUP WILL BE SUPPORTIVE FOR SUPERCELL DEVELOPMENT WITH
AN ATTENDANT THREAT FOR A COUPLE OF TORNADOES IN ADDITION TO SEVERE
HAIL AND DAMAGING WINDS.

AVIATION...TORNADOES AND 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
500. MEAN STORM MOTION VECTOR 25040.


...MEAD


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