URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 362 NWS STORM PREDICTION CENTER NORMAN OK 340 PM EDT TUE JUN 25 2013 THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF WESTERN MARYLAND NORTHERN AND CENTRAL OHIO WESTERN PENNSYLVANIA NORTHERN WEST VIRGINIA LAKE ERIE * EFFECTIVE THIS TUESDAY AFTERNOON FROM 340 PM UNTIL MIDNIGHT EDT. * PRIMARY THREATS INCLUDE... SEVERAL DAMAGING WIND GUSTS TO 70 MPH LIKELY SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES EAST OF LATROBE PENNSYLVANIA TO 65 MILES NORTH NORTHWEST OF DAYTON OHIO. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 361... DISCUSSION...STORM DEVELOPMENT IS NOW WELL UNDERWAY IN THE PRESENCE OF MODERATE BOUNDARY LAYER INSTABILITY. CONSOLIDATING COLD POOLS MAY CONTRIBUTE TO FURTHER UPSCALE CONVECTIVE GROWTH...AND THE EVOLUTION OF ONE OR TWO SMALL STORM CLUSTERS ACCOMPANIED BY THE RISK FOR DAMAGING WIND GUSTS. EAST SOUTHEASTWARD MOTION WILL BE ENHANCED BY A BELT OF 20-30 KT WESTERLY LOWER/MID TROPOSPHERIC FLOW. 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 27030.
Posted on: Tue, 25 Jun 2013 20:09:09 +0000
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