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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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