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WWUS20 KWNS 102111

SEL6

SPC WW 102111

CTZ000-MAZ000-NJZ000-NYZ000-OHZ000-PAZ000-VTZ000-WVZ000-110300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 696

NWS STORM PREDICTION CENTER NORMAN OK

510 PM EDT MON AUG 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN CONNECTICUT

       EXTREME WESTERN MASSACHUSETTS

       NORTHERN NEW JERSEY

       EASTERN AND SOUTHEAST NEW YORK

       EXTREME EAST CENTRAL OHIO

       PENNSYLVANIA

       SOUTHERN VERMONT

       NORTHERN PANHANDLE OF WEST VIRGINIA



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 510 PM UNTIL

1100 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 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTH

SOUTHWEST OF PITTSBURGH PENNSYLVANIA TO 10 MILES SOUTHEAST OF

PITTSFIELD MASSACHUSETTS.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 694...WW 695...



DISCUSSION...LINE OF STRONG/SEVERE STORMS FROM SOUTH CENTRAL NY SWWD

INTO ERN OH IS EXPECTED TO CONTINUE PROGRESSING SEWD THIS EVENING.

IN ADDITION...NEW STORMS ARE DEVELOPING OVER WRN AND NERN PARTS OF

PA.  THE AIR MASS IS VERY WARM/MOIST WITH TEMPERATURES IN THE

80S/LOWER 90S AND DEW POINTS IN THE UPPER 60S/LOWER

70S...CONTRIBUTING TO MLCAPE OF 1500-2500 J/KG.  WESTERLY FLOW OF

30-40 KT ABOVE 2-3 KM IS PROVIDING SUFFICIENT SHEAR TO PROMOTE STORM

ORGANIZATION...AND UNIDIRECTIONAL PROFILES SUGGEST POTENTIAL FOR

BOWING LINE SEGMENTS.



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 500. MEAN STORM

MOTION VECTOR 27025.





...WEISS

