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303 

WWUS20 KWNS 250459

SEL8

SPC WW 250459

GAZ000-KYZ000-NCZ000-TNZ000-VAZ000-250900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 18

NWS STORM PREDICTION CENTER NORMAN OK

1200 AM EST FRI FEB 25 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN GEORGIA

       SOUTHEAST KENTUCKY

       EXTREME WESTERN NORTH CAROLINA

       EAST TENNESSEE

       EXTREME SOUTHWEST VIRGINIA



EFFECTIVE THIS FRIDAY MORNING FROM MIDNIGHT UNTIL 400 AM EST.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHEAST OF

LONDON KENTUCKY TO 30 MILES EAST SOUTHEAST OF ANNISTON ALABAMA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 16...WW 17...



DISCUSSION...FAST-MOVING SQUALL LINE CONTINUES TO SURGE EASTWARD

ACROSS THE TN VALLEY AT OVER 40 KNOTS.  STORMS ARE EXPECTED TO BEGIN

WEAKENING IN THE NEXT FEW HOURS...BUT MAY REMAIN CAPABLE OF AT LEAST

LOCALLY DAMAGING WINDS THROUGH 09Z.



AVIATION...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 25040.





...HART

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