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WWUS20 KWNS 050206

SEL3

SPC WW 050206

MDZ000-OHZ000-PAZ000-WVZ000-LEZ000-050800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 573

NWS STORM PREDICTION CENTER NORMAN OK

1005 PM EDT WED AUG 4 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR WESTERN MARYLAND

       CENTRAL AND EASTERN OHIO

       WESTERN PENNSYLVANIA

       NORTHERN  AND CENTRAL WEST VIRGINIA

       LAKE ERIE



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1005 PM

UNTIL 400 AM EDT.



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 85

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST

NORTHWEST OF COLUMBUS OHIO TO 20 MILES SOUTH SOUTHEAST OF LATROBE

PENNSYLVANIA.  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 570...WW 571...WW 572...



DISCUSSION...WRN OH MCS EXPECTED TO CONTINUE E/ESE AT ABOUT 35 KTS.

DEVELOPMENT EXPECTED TO BE CONFINED TO AREA ALONG AND N OF OUTFLOW

BOUNDARY FROM PREVIOUS MCS.  THIS BOUNDARY ATTM ACRS ACROSS SRN OH

ABOUT 30 MILES N OF THE OH RVR.  LINGERING PRESENCE OF EML ABOVE

SHALLOW MCS OUTFLOW...30-40 KT UNIDIRECTIONAL LWR TROPOSPHERIC

FLOW...AND RICH MOISTURE INFLOW ALONG WSWLY LLJ SUGGEST CONTINUED

THREAT FOR SMALL BOWS WITH LOCALLY DMGG WIND...DESPITE TIME OF DAY

AND SLIGHTLY ELEVATED NATURE OF STORMS.



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 500. MEAN STORM

MOTION VECTOR 28035.





...CORFIDI

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