

167 

WWUS20 KWNS 020028

SEL9

SPC WW 020028

NYZ000-PAZ000-020400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 339

NWS STORM PREDICTION CENTER NORMAN OK

825 PM EDT FRI JUN 1 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTH CENTRAL NEW YORK

       NORTHEAST PENNSYLVANIA



EFFECTIVE THIS FRIDAY NIGHT FROM 825 PM UNTIL MIDNIGHT 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 40

STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES WEST

NORTHWEST OF BINGHAMTON NEW YORK TO 45 MILES SOUTH OF WILKESBARRE

PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 332...WW 334...WW

335...WW 336...WW 337...WW 338...



DISCUSSION...NRN END OF PRE-COLD FRONTAL SQLN IN N CNTRL PA EXPECTED

TO CONTINUE ENEWD...WITH SOME CONTINUED NWD DEVELOPMENT POSSIBLE AS

ASSOCIATED UPR IMPULSE NOW OVER ERN OH ASSUMES MORE OF A NEGATIVE

TILT.  WHILE LOW LVL BUOYANCY WILL REMAIN MINIMAL IN WW

AREA...STRENGTHENING OF LOW TO MID LVL WIND FIELD WITH APPROACHING

TROUGH...AND PRESENCE OF EXISTING SQLN/SUSTAINED STORMS SUGGEST

POSSIBILITY FOR DMGG WIND.  ON THE SRN EDGE OF WW...WFO PHI /MT

HOLLY NJ/ WILL EXTEND WW 338 NWD INTO CARBON AND MONROE CNTYS PA TO

MEET WITH THIS WW.



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 400. MEAN STORM

MOTION VECTOR 21045.





...CORFIDI

