SEVERE THUNDERSTORM WATCH #416 SEL6 URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 416 NWS STORM PREDICTION CENTER NORMAN OK 230 PM EDT WED JUL 17 2013 THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF NORTHERN NEW YORK VERMONT LAKE ONTARIO * EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 230 PM UNTIL MIDNIGHT EDT. * PRIMARY THREATS INCLUDE... SEVERAL DAMAGING WIND GUSTS TO 70 MPH LIKELY THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 10 MILES SOUTHWEST OF WATERTOWN NEW YORK TO 40 MILES SOUTHEAST OF NEWPORT VERMONT. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6). 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. && DISCUSSION...TSTMS NOW FORMING IN SRN ONT /N OF LK ONT/ EXPECTED TO MOVE/DEVELOP GENERALLY ESE INTO PARTS OF UPSTATE NY AND VT AS ASSOCIATED UPR IMPULSE CONTINUES ESEWD. GRADUALLY INCREASING DEEP SHEAR AND STEEPENING LOW-LVL LAPSE RATES SHOULD SUPPORT SUFFICIENT STRENGTHENING OF STORMS TO POSE A RISK FOR DMGG WIND AND POSSIBLY MARGINALLY SVR HAIL IN WW AREA THROUGH LATE THIS AFTN/EARLY THIS EVE. UPSTREAM LINE OF STORMS NOW FORMING FARTHER N IN ON IS ASSOCIATED WITH ANOTHER...STRONGER UPR IMPULSE NOW OVER WRN ONT. THIS LINE SHOULD REMAIN STRONG TO SVR AS IT CONTINUES ESE INTO NRN NY/NRN NEW ENGLAND THIS EVE. STRENGTHENING DEEP WNWLY WIND FIELD/ASCENT AHEAD OF IMPULSE...AND UPLIFT ALONG STORM OUTFLOW BOUNDARIES...SUGGEST POTENTIAL FOR SUSTAINED STORMS/EMBEDDED SUPERCELLS. ASSOCIATED LEWPS AND BOW SEGMENTS MAY YIELD DMGG WIND AND POSSIBLY AN ISOLD TORNADO INTO LATE EVE. 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 30025. ...CORFIDI
Posted on: Wed, 17 Jul 2013 21:16:19 +0000
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