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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 658

NWS STORM PREDICTION CENTER NORMAN OK

120 PM CDT MON OCT 1 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EAST CENTRAL AND NORTHEAST ALABAMA

       NORTHERN AND WESTERN GEORGIA

       SOUTHERN MIDDLE TENNESSEE



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 120 PM UNTIL 800

PM CDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 65 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTH SOUTHEAST OF

COLUMBUS GEORGIA TO 40 MILES WEST NORTHWEST OF CHATTANOOGA

TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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.



DISCUSSION...MODEST HEATING OF A VERY MOIST WARM SECTOR BOUNDARY

LAYER HAS CONTRIBUTED TO AN INCREASE IN THUNDERSTORMS OVER THE PAST

HOUR OR SO.  THE DEVELOPING STORMS HAVE BEGUN TO EXHIBIT WEAK

LOW-LEVEL CIRCULATIONS...AND GIVEN THE FAVORABLE LOW-LEVEL MOISTURE

AND STRONG LOW-LEVEL SHEAR /0-1 KM SHEAR VALUES AROUND 30 KT/...AN

UPWARD TREND IN TERMS OF STORM ORGANIZATION IS POSSIBLE THIS

AFTERNOON.  AS A RESULT...POTENTIAL FOR A FEW TORNADOES ALONG WITH

LOCALLY DAMAGING WIND GUSTS IS EVIDENT.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 55 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.

MEAN STORM MOTION VECTOR 21035.





...GOSS/HART

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