WATCHES: Severe Thunderstorm Watch Number 696

WWUS20 KWNS 102111
SEL6
SPC WW 102111
CTZ000-MAZ000-NJZ000-NYZ000-OHZ000-PAZ000-VTZ000-WVZ000-110300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 696
NWS STORM PREDICTION CENTER NORMAN OK
510 PM EDT MON AUG 10 2009

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

WESTERN CONNECTICUT
EXTREME WESTERN MASSACHUSETTS
NORTHERN NEW JERSEY
EASTERN AND SOUTHEAST NEW YORK
EXTREME EAST CENTRAL OHIO
PENNSYLVANIA
SOUTHERN VERMONT
NORTHERN PANHANDLE OF WEST VIRGINIA

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 510 PM UNTIL
1100 PM EDT.

HAIL TO 2 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 70
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTH
SOUTHWEST OF PITTSBURGH PENNSYLVANIA TO 10 MILES SOUTHEAST OF
PITTSFIELD MASSACHUSETTS. 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.

OTHER WATCH INFORMATION...CONTINUE...WW 694...WW 695...

DISCUSSION...LINE OF STRONG/SEVERE STORMS FROM SOUTH CENTRAL NY SWWD
INTO ERN OH IS EXPECTED TO CONTINUE PROGRESSING SEWD THIS EVENING.
IN ADDITION...NEW STORMS ARE DEVELOPING OVER WRN AND NERN PARTS OF
PA. THE AIR MASS IS VERY WARM/MOIST WITH TEMPERATURES IN THE
80S/LOWER 90S AND DEW POINTS IN THE UPPER 60S/LOWER
70S...CONTRIBUTING TO MLCAPE OF 1500-2500 J/KG. WESTERLY FLOW OF
30-40 KT ABOVE 2-3 KM IS PROVIDING SUFFICIENT SHEAR TO PROMOTE STORM
ORGANIZATION...AND UNIDIRECTIONAL PROFILES SUGGEST POTENTIAL FOR
BOWING LINE SEGMENTS.

AVIATION...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 500. MEAN STORM
MOTION VECTOR 27025.

...WEISS

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