

232 

WWUS20 KWNS 261529

SEL6

SPC WW 261529

CTZ000-MAZ000-NHZ000-NYZ000-PAZ000-VTZ000-LOZ000-262300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 686

NWS STORM PREDICTION CENTER NORMAN OK

1130 AM EDT TUE JUL 26 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHWEST CONNECTICUT

       EXTREME WESTERN MASSACHUSETTS

       NORTHERN AND WESTERN NEW HAMPSHIRE

       CENTRAL AND EASTERN NEW YORK

       EXTREME NORTHEAST PENNSYLVANIA

       VERMONT

       LAKE ONTARIO



EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1130 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 100

STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES WEST

NORTHWEST OF NEWPORT VERMONT TO 35 MILES SOUTH SOUTHEAST OF

BINGHAMTON 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 ARE EXPECTED TO CONTINUE DEVELOPING ALONG AND

AHEAD OF A COLD FRONT MOVING SEWD ACROSS THE LOWER GREAT LAKES INTO

NEW YORK AND NEW ENGLAND.  STRONG DYNAMIC FORCING FOR ASCENT

ASSOCIATED WITH S STRONG JET STREAM ALOFT COUPLED WITH STEEPENING

LOW LEVEL LAPSE RATES WILL ENHANCE THREAT FOR HAIL AND DAMAGING WIND

GUSTS WITH STRONGER CELLS.  ACTIVITY IS LIKELY TO SPREAD RAPIDLY EWD

DURING THE AFTERNOON.



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 400. MEAN STORM

MOTION VECTOR 27035.





...WEISS

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