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WWUS20 KWNS 072152

SEL8

SPC WW 072152

OHZ000-PAZ000-WVZ000-080400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 738

NWS STORM PREDICTION CENTER NORMAN OK

550 PM EDT SUN AUG 7 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN OHIO

       SOUTHWEST PENNSYLVANIA

       NORTHERN WEST VIRGINIA



EFFECTIVE THIS SUNDAY AFTERNOON FROM 550 PM UNTIL MIDNIGHT 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 110

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF

WHEELING WEST VIRGINIA TO 10 MILES EAST OF ATHENS OHIO.  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 734...WW 735...WW

736...WW 737...



DISCUSSION...ARC-SHAPED TSTM COMPLEX...WITH EMBEDDED SMALLER

BOWS...EXPECTED TO CONTINUE GENERALLY EWD WITH MEAN WLY FLOW THROUGH

MID TO LATE EVE.  ADDITIONAL BOWING STRUCTURES MAY FORM AS EXISTING

STORMS ENCOUNTER CELLS ALONG W-E BOUNDARY NOW EXTENDING FROM SE OF

CMH TO BETWEEN HLG AND PKB.  SOMEWHAT LATER THIS EVE... AN

ADDITIONAL SMALL BOW OR TWO MAY EVOLVE FROM TRAILING SW PART OF

LARGE SCALE BOW NOW OVER S CNTRL OH...AS THAT PORTION OF THE LINE

CONTINUES ESE INTO VERY WARM/MOIST AIR OVER THE RISING TERRAIN OF SE

OH/NW WV.



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 550. MEAN STORM MOTION

VECTOR 28035.





...CORFIDI

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