

175 

WWUS20 KWNS 190658

SEL0

SPC WW 190658

FLZ000-GAZ000-CWZ000-191400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 30

NWS STORM PREDICTION CENTER NORMAN OK

155 AM EST THU FEB 19 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN FLORIDA AND THE FLORIDA PANHANDLE

       SOUTH GEORGIA

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING FROM 155 AM UNTIL 900 AM EST.



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 145 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES EAST NORTHEAST OF

WAYCROSS GEORGIA TO 5 MILES WEST SOUTHWEST OF APALACHICOLA

FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 SEVERE

THUNDERSTORM WATCH NUMBER 29. WATCH NUMBER 29 WILL NOT BE IN

EFFECT AFTER 155 AM EST. CONTINUE...WW 26...WW 27...WW 28...



DISCUSSION...SUSTAINED STORMS/SUPERCELLS EXPECTED TO PERSIST THROUGH

AT LEAST 12Z ALONG LOOSELY-ORGANIZED PRE-FRONTAL CONFLUENCE AXIS

EXTENDING WSW FROM NEAR VAD.  ABSENCE OF STRONG LINEAR

FORCING...LONG RESIDENCE TIMES OF STORMS IN SATELLITE-DERIVED PW

AXIS...VERY STRONG/SLIGHTLY CURVED WIND PROFILES...AND EXPECTED

STRENGTHENING OF WIND FIELD/ LARGE SCALE ASCENT WITH CONTINUED

AMPLIFICATION OF LARGER SCALE TROUGH SUGGEST POTENTIAL FOR

SEMI-DISCRETE SVR STORMS AND ISOLD STRONG TORNADOES.



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

450. MEAN STORM MOTION VECTOR 27045.





...CORFIDI

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