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WWUS20 KWNS 161838

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SPC WW 161838

ALZ000-FLZ000-GAZ000-SCZ000-170200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 890

NWS STORM PREDICTION CENTER NORMAN OK

135 PM EST WED NOV 16 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       FAR SOUTHEAST ALABAMA

       WESTERN AND CENTRAL FLORIDA PANHANDLE

       GEORGIA

       WESTERN SOUTH CAROLINA



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 135 PM UNTIL

900 PM EST.



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 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES WEST OF MOULTRIE

GEORGIA TO 20 MILES WEST NORTHWEST OF GREENVILLE SOUTH CAROLINA.

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...CONTINUE...WW 889...



DISCUSSION...PRE-FRONTAL CONVECTIVE BAND --COMPOSED OF SUPERCELLS

AND BOWING STRUCTURES-- IS EXPECTED TO MOVE/DEVELOP ACROSS THE WATCH

AREA THIS AFTERNOON AND EVENING.  AMBIENT INFLOW AIR MASS IS

CHARACTERIZED BY A MOIST BOUNDARY LAYER /I.E. DEWPOINTS IN THE

MID-UPPER 60S/ AND WARMING TEMPERATURES WITH MLCAPE VALUES OF

500-1500 J/KG.  VERTICAL SHEAR /BOTH IN THE LOW LEVELS AND THROUGH A

DEEP LAYER/ WILL REMAIN SUPPORTIVE OF CURRENTLY OBSERVED ORGANIZED

STORM MODES WITH ATTENDANT THREATS FOR DAMAGING WINDS AND A FEW

TORNADOES.



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 450.

MEAN STORM MOTION VECTOR 24035.





...MEAD

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