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WWUS20 KWNS 220825

SEL0

SPC WW 220825

OHZ000-PAZ000-WVZ000-LEZ000-221600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 380

NWS STORM PREDICTION CENTER NORMAN OK

425 AM EDT TUE JUN 22 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN OHIO

       WESTERN PENNSYLVANIA

       THE NORTHERN PANHANDLE OF WEST VIRGINIA

       LAKE ERIE



EFFECTIVE THIS TUESDAY MORNING FROM 425 AM UNTIL NOON EDT.



HAIL TO 1.5 INCHES 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 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 10 MILES EAST OF

FRANKLIN PENNSYLVANIA TO 30 MILES NORTH NORTHWEST OF COLUMBUS

OHIO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 374...WW 375...WW

376...WW 377...WW 378...WW 379...



DISCUSSION...SLIGHTLY ELEVATED WAA TSTMS EXPECTED TO INCREASE AND

MOVE GENERALLY E ACROSS OH/WRN PA...ON SRN FRINGE OF MI SHORTWAVE

TROUGH.  SUFFICIENT CLOUD LAYER SHEAR AND INSTABILITY MAY DEVELOP TO

SUPPORT A FEW SUSTAINED UPDRAFTS WITH SVR WIND/HAIL.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 26035.





...CORFIDI

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