

875 

WWUS20 KWNS 211145

SEL2

SPC WW 211145

FLZ000-GAZ000-SCZ000-CWZ000-211900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 22

NWS STORM PREDICTION CENTER NORMAN OK

640 AM EST FRI FEB 21 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN FLORIDA AND EASTERN FLORIDA PANHANDLE

  SOUTHERN AND EASTERN GEORGIA

  CENTRAL AND WESTERN SOUTH CAROLINA

  COASTAL WATERS



* EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 640 AM UNTIL

  200 PM EST.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 75

    MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES SOUTHEAST OF

TALLAHASSEE FLORIDA TO 65 MILES NORTH OF COLUMBIA SOUTH CAROLINA.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU2).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 21...



DISCUSSION...BAND OF STG-SVR TSTMS IS FCST TO PROCEED EWD ACROSS WW

AREA WITH OCNL LEWP./BOW FORMATIONS LOCALLY MAXIMIZING DAMAGING-WIND

POTENTIAL.  THREAT INITIALLY IS WIDELY SCATTERED TO ISOLATED AND

MRGL...BUT SHOULD RAMP UP WITH TIME AFTER SUNRISE AS TWO PROCESSES

DESTABILIZE FOREGOING/INFLOW LAYER...AMIDST FAVORABLE DEEP SHEAR...

1. THETAE ADVECTION FROM BOTH GULF AND ATLC...CONSTRICTING WIDTH OF

PLUME OF RELATIVELY STABLE TRAJECTORIES FROM FL PENINSULA AND

2. DIABATIC SFC HEATING THROUGH ANVIL CLOUD COVER.



AVIATION...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 500. MEAN STORM MOTION

VECTOR 25035.





...EDWARDS

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