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WWUS20 KWNS 090552

SEL3

SPC WW 090552

KYZ000-OHZ000-PAZ000-WVZ000-LEZ000-090900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 13

NWS STORM PREDICTION CENTER NORMAN OK

1255 AM EST WED JAN 9 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST KENTUCKY

       CENTRAL AND EASTERN OHIO

       NORTHWEST PENNSYLVANIA

       WESTERN WEST VIRGINIA

       LAKE ERIE



EFFECTIVE THIS WEDNESDAY MORNING FROM 1255 AM UNTIL 400 AM EST.



HAIL TO 0.5 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 15 MILES SOUTH OF

HUNTINGTON WEST VIRGINIA TO 45 MILES NORTH OF YOUNGSTOWN OHIO.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 11...WW 12...



DISCUSSION...LOW-TOPPED LINE SEGMENTS EMBEDDED IN STRONG WIND FIELD

ASSOCIATED WITH DEEPENING SFC LOW MAY PRODUCE SWATHS OF DAMAGING

WIND AS FAST-MOVING BAND OF ASCENT ENCOUNTERS SLIGHTLY WARMER AIR IN

ERN OH.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 300. MEAN STORM

MOTION VECTOR 22050.





...CORFIDI

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