[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 111657
SEL6
SPC WW 111657
ALZ000-TNZ000-120000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 96
NWS STORM PREDICTION CENTER NORMAN OK
1200 PM CDT THU APR 11 2013

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

       WEST CENTRAL INTO NORTH CENTRAL ALABAMA
       SOUTHERN MIDDLE TENNESSEE

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM NOON UNTIL 700
PM CDT.

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 55 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES EAST SOUTHEAST OF
MERIDIAN MISSISSIPPI TO 25 MILES NORTH NORTHWEST 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 95...

DISCUSSION...PRE-FRONTAL SUPERCELL HAS FORMED IN E CENTRAL MS AND
WILL CONTINUE TO MOVE NEWD INTO WRN AL AROUND THE TIME THE STORM
MERGES WITH THE FRONTAL BAND OF CONVECTION IMMEDIATELY TO ITS W.
SOME SURFACE HEATING IN A FEW CLOUD BREAKS AND INCREASING LOW-LEVEL
MOISTURE WILL RESULT IN DESTABILIZATION AND THE LIKELIHOOD THAT
STORMS IN THE LINE WILL STRENGTHEN THIS AFTERNOON WITH AN ATTENDANT
RISK FOR DAMAGING WINDS.  THE TORNADO THREAT WILL BE LARGELY
DEPENDENT ON THE FORMATION OF MORE DISCRETE STORMS AHEAD OF THE
LINE...THOUGH LOW-LEVEL SHEAR WILL BE SUFFICIENT FOR CIRCULATIONS
WITHIN THE LINE.

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 24040.


...THOMPSON


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