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000 

WWUS20 KWNS 111842

SEL4

SPC WW 111842

ALZ000-MSZ000-120100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 124

NWS STORM PREDICTION CENTER NORMAN OK

140 PM CDT WED APR 11 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND NORTHERN ALABAMA

       EAST CENTRAL MISSISSIPPI



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 140 PM UNTIL

800 PM CDT.



TORNADOES...HAIL TO 2 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 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF

HUNTSVILLE ALABAMA TO 55 MILES EAST SOUTHEAST OF MERIDIAN

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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...SKIES WILL CONTINUE TO CLEAR FROM WEST TO EAST ACROSS

WW THIS AFTERNOON AHEAD OF SURFACE COLD FRONT NOW MOVING INTO NWRN

AL/CENTRAL MS.  THIS WILL ALLOW EXPANDING AREA OF MARGINAL TO

MODERATE INSTABILITY TO DEVELOP OVER THE REGION INTO THE EVENING.

LOW AND DEEP LAYER SHEAR WILL ALSO REMAIN QUITE STRONG.  THIS WILL

INCREASE THE POTENTIAL FOR SUPERCELLS AND SMALL LINE SEGMENTS.

ALONG WITH LARGE HAIL AND DAMAGING WINDS...A FEW TORNADOES MAY ALSO

OCCUR WITH THE STRONGER STORMS.



AVIATION...TORNADOES AND 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 26035.





...EVANS

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