

000 

WWUS20 KWNS 131852

SEL2

SPC WW 131852

ALZ000-MSZ000-140200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 22

NWS STORM PREDICTION CENTER NORMAN OK

1250 PM CST TUE FEB 13 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND NORTHERN ALABAMA

       CENTRAL AND NORTHERN MISSISSIPPI



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL

800 PM CST.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 95

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES WEST

NORTHWEST OF MUSCLE SHOALS ALABAMA TO 35 MILES EAST SOUTHEAST OF

MERIDIAN MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 20...WW 21...



DISCUSSION...TSTMS/POSSIBLE SUPERCELLS EXPECTED TO FORM IN THE NEXT

1-2 HRS OVER CNTRL MS AS HEATING AND LARGE SCALE ASCENT ASSOCIATED

WITH APPROACHING NEG TILT TROUGH FURTHER DESTABILIZE REGION.  LOW

LEVEL CONVERGENCE WILL BE PROVIDED BY SFC TROUGH AND COLD FRONT

EXTENDING SSW FROM WRN KY LOW.  MODERATELY LONG/STRAIGHT HODOGRAPHS

WITH 40+ KT DEEP WSWLY SHEAR SUGGEST A GOOD LIKELIHOOD FOR

HAIL...AND POSSIBLY SHORT BOWING SEGMENTS WITH WIND AND/OR AN

ISOLATED TORNADO...AS ACTIVITY MOVES/DEVELOPS ENE INTO AL.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 25035.





...CORFIDI

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