

623 

WWUS20 KWNS 031704

SEL0

SPC WW 031704

CTZ000-MAZ000-NHZ000-NJZ000-NYZ000-RIZ000-VTZ000-CWZ000-040000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 250

NWS STORM PREDICTION CENTER NORMAN OK

105 PM EDT THU JUN 3 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CONNECTICUT

       MASSACHUSETTS

       SOUTHERN NEW HAMPSHIRE

       FAR NORTHEASTERN NEW JERSEY

       SOUTHEASTERN NEW YORK

       RHODE ISLAND

       SOUTHERN VERMONT

       COASTAL WATERS



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 105 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 55

STATUTE MILES EITHER SIDE OF A LINE FROM 30 MILES NORTH NORTHEAST

OF BOSTON MASSACHUSETTS TO 10 MILES WEST OF NEW YORK CITY NEW

YORK.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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...THUNDERSTORMS ARE EXPECTED TO DEVELOP THROUGH THE

AFTERNOON AHEAD OF SLOW MOVING COLD FRONT. A VERY MOIST AND UNSTABLE

AIR MASS.. MLCAPES TO 2500 J/KG...AND DEEP LAYER SHEAR AT 30-40 KT

WILL BE FAVORABLE FOR WEAKLY ORGANIZED SUPERCELLS WITH THE POTENTIAL

FOR WIND DAMAGE AND HAIL.



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.





...IMY

