

719 

WWUS20 KWNS 211451

SEL6

SPC WW 211451

CTZ000-MAZ000-NHZ000-NYZ000-PAZ000-VTZ000-212300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 726

NWS STORM PREDICTION CENTER NORMAN OK

1050 AM EDT FRI AUG 21 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN CONNECTICUT

       MASSACHUSETTS

       NEW HAMPSHIRE

       SOUTHEAST NEW YORK

       NORTHEAST PENNSYLVANIA

       VERMONT



EFFECTIVE THIS FRIDAY MORNING AND EVENING FROM 1050 AM UNTIL 700

PM EDT.



HAIL TO 1.5 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 75

STATUTE MILES EAST AND WEST OF A LINE FROM 10 MILES NORTHWEST OF

BERLIN NEW HAMPSHIRE TO 30 MILES SOUTH SOUTHEAST OF MONTICELLO

NEW YORK.  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.



DISCUSSION...STORMS SHOULD INCREASE IN COVERAGE AND INTENSITY INTO

THE AFTERNOON ACROSS THE WARM SECTOR FROM SERN NY THROUGH NEW

ENGLAND. MODERATE INSTABILITY WITH 2500 J/KG MLCAPE AND 35-45 KT

BULK SHEAR WILL SUPPORT ORGANIZED STORM STRUCTURES INCLUDING BOWING

SEGMENTS AND SUPERCELLS. DAMAGING WIND SHOULD BE THE MAIN

THREAT...BUT HAIL AND AN ISOLATED TORNADO OR TWO IS ALSO POSSIBLE.



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 24035.





...DIAL

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