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WWUS20 KWNS 111657

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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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