SEL4 URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 314 NWS STORM PREDICTION CENTER NORMAN OK 105 PM EDT TUE MAY 29 2012 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF CENTRAL AND SOUTHERN NEW YORK CENTRAL AND EASTERN PENNSYLVANIA EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 105 PM UNTIL 900 PM EDT. HAIL TO 2 INCHES 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 60 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTHWEST OF HARRISBURG PENNSYLVANIA TO 65 MILES NORTHEAST OF BINGHAMTON NEW YORK. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4). 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 312...WW 313... DISCUSSION...STRONG/SEVERE STORMS FROM WRN PA INTO WRN NY ARE EXPECTED TO SPREAD EWD THIS AFTERNOON...WHILE NEW STORMS ARE LIKELY TO DEVELOP FARTHER TO THE EAST WITHIN A VERY UNSTABLE AND WEAKLY CAPPED ENVIRONMENT /MUCAPE TO 3000 J PER KG/. SWLY MID LEVEL WINDS OF 30-35 KT ARE CONTRIBUTING TO SUFFICIENT VERTICAL SHEAR TO ENHANCE STORM ORGANIZATION WITH MULTICELL AND ISOLATED SUPERCELL STRUCTURES LIKELY. LARGE HAIL AND DAMAGING WIND GUSTS WILL BE POSSIBLE WITH STRONGER CELLS AS ACTIVITY SPREADS EWD/NEWD INTO THE EARLY EVENING HOURS. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 24025.
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