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725 

WWUS20 KWNS 101629

SEL2

SPC WW 101629

ALZ000-GAZ000-TNZ000-110000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 132

NWS STORM PREDICTION CENTER NORMAN OK

1125 AM CDT FRI APR 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN ALABAMA

       NORTHWEST GEORGIA

       MIDDLE AND PARTS OF EASTERN TENNESSEE



EFFECTIVE THIS FRIDAY MORNING AND EVENING FROM 1125 AM UNTIL 700

PM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE HAIL TO 3 INCHES IN DIAMETER...

THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE

POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH OF CROSSVILLE

TENNESSEE TO 55 MILES EAST OF COLUMBUS MISSISSIPPI.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU2).



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 131...



DISCUSSION...LINE OF INTENSE SUPERCELLS EXPECTED TO CONTINUE TO

DEVELOP EWD ACROSS TN VLY AREA AND INTO NRN MIDDLE AND PARTS OF ERN

TN THROUGH THE AFTERNOON. AIRMASS AHEAD OF THIS LINE IS MODESTLY

UNSTABLE WITH MLCAPE VALUES INCREASING TO OVER 1500 J/KG ACROSS THE

TN VLY ATTM. GIVEN LITTLE CONVECTIVE INHIBITION AND MODEST TO STRONG

ASCENT WITHIN/BENEATH LEFT EXIST REGION OF 80KT MID LEVEL JET

STREAK...EXPECT STORMS TO CONTINUE TO MAINTAIN SEVERE INTENSITY

THROUGH THE AFTERNOON. OF PARTICULAR CONCERN IS MAGNITUDE OF

VERTICAL SHEAR...ESPECIALLY ACROSS NRN AL/SRN MIDDLE TN THIS

AFTERNOON. FCST HODOGRAPHS IN THIS CORRIDOR SUGGEST HIGH POSSIBILITY

OF A STRONG TORNADO IF DISCRETE CELLS CAN MOVE INTO THIS AREA AS

ANTICIPATED. FARTHER NORTH...ACROSS MIDDLE TN...TORNADO THREAT WILL

ALSO BE ENHANCED NEAR LINE/RETREATING WARM FRONTAL BOUNDARY NEXT FEW

HOURS.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 26045.





...CARBIN

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