WATCHES: Severe Thunderstorm Watch Number 388

WWUS20 KWNS 271654
SEL8
SPC WW 271654
DCZ000-MDZ000-NYZ000-PAZ000-VAZ000-WVZ000-CWZ000-280000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 388
NWS STORM PREDICTION CENTER NORMAN OK
1255 PM EDT FRI MAY 27 2011

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

DISTRICT OF COLUMBIA
CENTRAL MARYLAND
CENTRAL NEW YORK
CENTRAL AND EASTERN PENNSYLVANIA
NORTHERN VIRGINIA
EASTERN WEST VIRGINIA PANHANDLE
COASTAL WATERS

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 1255 PM UNTIL
800 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 75
STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES SOUTH OF
CHARLOTTESVILLE VIRGINIA TO 50 MILES NORTHEAST OF ITHACA NEW
YORK. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

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 387...

DISCUSSION...SCATTERED THUNDERSTORMS WILL FORM THIS AFTERNOON IN
CORRIDOR OF MODERATE INSTABILITY FROM NORTHERN VA INTO PORTIONS OF
PA/NY. RATHER STRONG MID LEVEL WINDS AND STEEP LOW/MID LEVEL LAPSE
RATES WILL PROMOTE ORGANIZED STORMS INCLUDING A FEW SUPERCELLS.
LOCALLY DAMAGING WINDS AND HAIL ARE THE MAIN THREATS.

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 23035.

...HART

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