

803 

WWUS20 KWNS 051705

SEL2

SPC WW 051705

CTZ000-MAZ000-NYZ000-PAZ000-VTZ000-060000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 262

NWS STORM PREDICTION CENTER NORMAN OK

100 PM EDT SAT JUN 5 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN CONNECTICUT

       WESTERN MASSACHUSETTS

       EASTERN NEW YORK

       FAR NORTHEASTERN PENNSYLVANIA

       VERMONT



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 100 PM UNTIL

800 PM EDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH OF BURLINGTON

VERMONT TO 25 MILES WEST SOUTHWEST OF POUGHKEEPSIE NEW YORK.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU2).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



DISCUSSION...DISCRETE STORMS ARE BEGINNING TO DEVELOP OVER THE

HIGHER TERRAIN OF NY. AIR MASS HAS BECOME MODERATELY UNSTABLE AND

SHOULD DESTABILIZE FURTHER WITH ADDITIONAL HEATING AND WEAK COOLING

ALOFT. UPPER LEVEL DIFFLUENCE SPREADING INTO THE AREA SHOULD HELP

INITIATE MORE STORMS THROUGH THE AFTERNOON AND THE DEEP LAYER SHEAR

IS SUPPORTIVE OF DISCRETE SUPERCELLS. THOUGH LARGE HAIL IS LIKELY TO

BE THE MAIN THREAT...THE COMBINATION OF STRONG SPEED SHEAR IN THE

LOWER 1 TO 2 KM AND A MOIST BOUNDARY LAYER INDICATES A SUPERCELL OR

TWO MAY PRODUCE TORNADOES.



AVIATION...TORNADOES AND 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

450. MEAN STORM MOTION VECTOR 28030.





...IMY

