WATCHES: Severe Thunderstorm Watch Number 723...corrected

WWUS20 KWNS 202256 CCA
SEL3
SPC WW 202256 CCA
MDZ000-NYZ000-PAZ000-WVZ000-LEZ000-LOZ000-210400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 723...CORRECTED
NWS STORM PREDICTION CENTER NORMAN OK
705 PM EDT THU AUG 20 2009

CORRECTED FOR ENDING TIME

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

FAR WESTERN MARYLAND
WESTERN NEW YORK
WESTERN PENNSYLVANIA
NORTHERN WEST VIRGINIA
LAKE ERIE
LAKE ONTARIO

EFFECTIVE THIS THURSDAY NIGHT FROM 705 PM UNTIL MIDNIGHT 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 EAST AND WEST OF A LINE FROM 30 MILES SOUTH
SOUTHEAST OF MORGANTOWN WEST VIRGINIA TO 45 MILES NORTH NORTHWEST
OF ROCHESTER NEW YORK. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

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 721...WW 722...

DISCUSSION...ERN OH QLCS EXPECTED TO CONTINUE ENE INTO WRN
PA/NY...WHERE DEEP SHEAR SHOULD REMAIN SUFFICIENT FOR EMBEDDED
SUSTAINED STORMS/LEWPS AND SMALL SCALE BOWS WITH DMGG WIND. AHEAD
OF LINE...WEAKLY CONFLUENT LOW LVL SWLY FLOW MAY CONTINUE TO SUPPORT
DEVELOPMENT OF ISOLD STORMS THAT...GIVEN ENVIRONMENTAL SHEAR AND
MOISTURE...COULD EVOLVE INTO SMALL SUPERCELLS POSING A THREAT FOR
LOCALLY DMGG WIND...MARGINALLY SVR HAIL...AND POSSIBLY AN ISOLD
TORNADO.

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 23030.

...CORFIDI

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