

623 

WWUS20 KWNS 131408

SEL9

SPC WW 131408

ALZ000-FLZ000-GAZ000-CWZ000-132100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 149

NWS STORM PREDICTION CENTER NORMAN OK

1010 AM EDT MON APR 13 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEAST ALABAMA

       FLORIDA PANHANDLE

       SOUTHWEST GEORGIA

       COASTAL WATERS



EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 1010 AM UNTIL

500 PM EDT.



TORNADOES...HAIL TO 1.5 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 45 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 5 MILES NORTHWEST OF

PENSACOLA FLORIDA TO 20 MILES NORTH NORTHEAST OF VALDOSTA

GEORGIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 148. WATCH NUMBER 148 WILL NOT BE IN EFFECT AFTER

1010 AM EDT.



DISCUSSION...LINEAR MCS WILL PERSIST ACROSS THE REGION TODAY WITHIN

BAND OF STRONG WSWLY FLOW ALOFT AHEAD OF EJECTING SHORTWAVE TROUGH.

MODEST SURFACE HEATING AND CONTINUED MOISTENING AT THE SURFACE IS

EXPECTED TO SUPPORT MARGINAL TO MODERATE SURFACE-BASED INSTABILITY

BY THE LATE MORNING/EARLY AFTERNOON.  GIVEN DEGREE OF SHEAR...THIS

SHOULD SUPPORT A CONTINUED THREAT OF ISOLATED SEVERE

THUNDERSTORMS...INCLUDING TORNADO POTENTIAL.  VERY HEAVY RAINFALL

WILL ALSO ACCOMPANY THESE STORMS.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 26030.





...EVANS

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