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457 

WWUS20 KWNS 250230

SEL7

SPC WW 250230

ALZ000-MSZ000-TNZ000-250800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 17

NWS STORM PREDICTION CENTER NORMAN OK

830 PM CST THU FEB 24 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL ALABAMA

       EASTERN MISSISSIPPI

       SOUTHERN MIDDLE TENNESSEE



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 830 PM

UNTIL 200 AM CST.



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

TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH NORTHWEST OF

HUNTSVILLE ALABAMA TO 90 MILES SOUTH SOUTHWEST OF COLUMBUS

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 14...WW 15...WW 16...



DISCUSSION...A FAST MOVING SQUALL LINE WILL CONTINUE TO TRACK

EASTWARD ACROSS MS AND INTO AL DURING THE NEXT FEW HOURS.  EMBEDDED

CIRCULATIONS IN THE LINE WILL MAINTAIN A RISK OF ISOLATED

TORNADOES...BUT PRIMARY THREAT WILL BE WIDESPREAD DAMAGING WINDS.

STORMS ARE EXPECTED TO BEGIN TO SLOWLY WEAKEN AFTER MIDNIGHT AS THEY

TRACK ACROSS AL.



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

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

GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.

MEAN STORM MOTION VECTOR 24040.





...HART

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