

000 

WWUS20 KWNS 201810

SEL9

SPC WW 201810

CTZ000-MAZ000-NHZ000-NYZ000-PAZ000-RIZ000-VTZ000-CWZ000-210000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 709

NWS STORM PREDICTION CENTER NORMAN OK

210 PM EDT SUN JUL 20 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHERN CONNECTICUT

       MUCH OF MASSACHUSETTS

       PARTS OF SOUTHERN NEW HAMPSHIRE

       LARGE PART OF EASTERN NEW YORK

       SMALL PART OF NORTHEASTERN PENNSYLVANIA

       NORTHERN RHODE ISLAND

       PARTS OF SOUTHERN VERMONT

       COASTAL WATERS



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 210 PM UNTIL 800

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 65

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES SOUTH

SOUTHWEST OF ITHACA NEW YORK TO 45 MILES EAST NORTHEAST OF

WORCESTER MASSACHUSETTS.  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 708...



DISCUSSION...AIR MASS HAS BECOME MODERATELY UNSTABLE AND UNCAPPED

ACROSS THE WATCH AREA AS TEMPS WARM INTO THE LOW 90S. WITH 30KT OF

DEEP LAYER SHEAR THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY

WITH DAMAGING WINDS BECOMING THE PRIMARY SEVERE CONCERN.



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 26030.





...HALES

