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WWUS20 KWNS 082203

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 68

NWS STORM PREDICTION CENTER NORMAN OK

605 PM EDT THU APR 8 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN FLORIDA PANHANDLE

       SOUTHERN GEORGIA

       COASTAL WATERS



EFFECTIVE THIS THURSDAY EVENING FROM 605 PM UNTIL 1000 PM EDT.



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

TO 70 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 65 MILES NORTHWEST OF WAYCROSS

GEORGIA TO 40 MILES SOUTH SOUTHWEST OF TALLAHASSEE FLORIDA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 65. WATCH NUMBER 65 WILL NOT BE IN EFFECT AFTER 605

PM EDT. CONTINUE...WW 66...WW 67...



DISCUSSION...LOW CAPE/HIGH SHEAR ENVIRONMENT WILL PERSIST THROUGH

THE EVENING ACROSS THIS REGION IN ADVANCE OF SURFACE COLD FRONT

ADVANCING INTO CENTRAL GA/WRN FL PANHANDLE AT 22Z.  WV IMAGERY

INDICATES LARGE SCALE ASCENT WILL PERSIST ACROSS THIS REGION AND

POSSIBLY SUSTAIN DEEP MOIST CONVECTION WITHIN MARGINAL INSTABILITY.

SHEAR WILL ALSO REMAIN MORE THAN ADEQUATE FOR LOW-TOPPED SUPERCELLS

AND POSSIBLY SMALL BOW ECHOES.  DAMAGING WINDS AND AN ISOLATED

TORNADO OR TWO WILL BE PRIMARY THREATS.



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

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

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400.

MEAN STORM MOTION VECTOR 24035.





...EVANS

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