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WWUS20 KWNS 220318

SEL3

SPC WW 220318

ALZ000-FLZ000-CWZ000-221100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 683

NWS STORM PREDICTION CENTER NORMAN OK

1010 PM CDT FRI SEP 21 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN AND CENTRAL ALABAMA

       THE WESTERN AND CENTRAL FLORIDA PANHANDLE

       COASTAL WATERS



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1010 PM

UNTIL 600 AM CDT.



TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE

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

PENSACOLA FLORIDA TO 20 MILES NORTH NORTHEAST OF MONTGOMERY

ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 679...WW 681...WW 682...



DISCUSSION...SCTD BANDS OF SHOWERS/STORMS WITH LOW-LVL ROTATION

EXPECTED TO PERSIST INVOF WEAKENING TROPICAL CIRCULATION NOW

CENTERED NEAR PNS AS ASSOCIATED SLY LLJ SPREADS N ACROSS AL.  AREA

VWP DATA IN ERN AND NERN PARTS OF CIRCULATION SHOW SUFFICIENT LOW

LVL DIRECTIONAL SHEAR TO FOSTER UPDRAFT ROTATION AND POSSIBLE BRIEF

TORNADOES GIVEN LOW LCLS PRESENT THERE.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

450. MEAN STORM MOTION VECTOR 17030.





...CORFIDI

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