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WWUS20 KWNS 102214

SEL1

SPC WW 102214

OHZ000-PAZ000-WVZ000-110500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 91

NWS STORM PREDICTION CENTER NORMAN OK

615 PM EDT WED APR 10 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN OHIO

       WESTERN AND CENTRAL PENNSYLVANIA

       THE NORTHERN WEST VIRGINIA PANHANDLE



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 615 PM

UNTIL 100 AM EDT.



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 40

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES SOUTH

SOUTHWEST OF AKRON OHIO TO 65 MILES EAST OF ALTOONA PENNSYLVANIA.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 88...WW 89...WW 90...



DISCUSSION...ERN OH/NW PA SQLN EXPECTED TO CONTINUE ESE AT 35-40

KTS...BOLSTERED BY STRONG WLY REAR INFLOW SAMPLED BY KCLE VWP.

MODERATE... UNIDIRECTIONAL WLY BACKGROUND FLOW ON NRN FRINGE OF SE

U.S. UPR HIGH AND RELATIVELY STEEP LOW TO MID-LVL LAPSE RATES

SUGGEST POTENTIAL FOR CONTINUED DEVELOPMENT OF FORWARD-PROPAGATING

LINE SEGMENTS/SMALL BOWS WITH DMGG WIND/MARGINALLY SVR HAIL THROUGH

MID-LATE EVE.



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 500. MEAN STORM MOTION

VECTOR 28035.





...CORFIDI

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