WATCHES: Urgent - Immediate Broadcast Requested

WWUS20 KWNS 261842
SEL7
SPC WW 261842
CTZ000-DCZ000-DEZ000-MDZ000-NJZ000-NYZ000-PAZ000-VAZ000-WVZ000-CWZ00
0-270200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 517
NWS STORM PREDICTION CENTER NORMAN OK
245 PM EDT FRI JUN 26 2009

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

SOUTHERN CONNECTICUT
DISTRICT OF COLUMBIA
DELAWARE
MUCH OF MARYLAND
NEW JERSEY
SOUTHEAST NEW YORK INCLUDING LONG ISLAND
SOUTHERN PENNSYLVANIA
NORTHERN VIRGINIA
EASTERN WEST VIRGINIA PANHANDLE
COASTAL WATERS

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 245 PM UNTIL
1000 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 95
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES EAST
SOUTHEAST OF ISLIP NEW YORK TO 40 MILES SOUTHWEST OF ALTOONA
PENNSYLVANIA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).

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 515...WW 516...

DISCUSSION...SCATTERED THUNDERSTORMS ARE INCREASING ACROSS PARTS OF
PA/MD/NY IN A VERY MOIST AND UNSTABLE AIRMASS. THESE STORMS WILL
PROPAGATE SOUTHEASTWARD TOWARD THE COAST THROUGH THE AFTERNOON AND
EVENING. DEGREE OF INSTABILITY AND SUFFICIENT DEEP LAYER EFFECTIVE
SHEAR WILL PROMOTE A RISK OF DAMAGING WINDS AND HAIL IN THE
STRONGEST CELLS.

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 29025.

...HART

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