SEL4
SPC WW 291725
DCZ000-DEZ000-MDZ000-NJZ000-PAZ000-VAZ000-CWZ000-300000-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 314
NWS STORM PREDICTION CENTER NORMAN OK
125 PM EDT FRI MAY 29 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
DELAWARE
EASTERN MARYLAND
SOUTHERN NEW JERSEY
PARTS OF SOUTHEAST PENNSYLVANIA
PARTS OF NORTHERN AND CENTRAL VIRGINIA
COASTAL WATERS
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 125 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 90
STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF
PHILADELPHIA PENNSYLVANIA TO 25 MILES WEST OF RICHMOND VIRGINIA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).
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.
DISCUSSION...THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY
ACROSS THE WATCH AREA THRU THE AFTERNOON AS AIR MASS CONTINUES TO
HEAT/DESTABILIZE. WITH 25-30KT OF SHEAR...PRIMARY STORM MODE WILL
BE MULTI-CELLULAR WITH ASSOCIATED DAMAGING WIND AND HAIL THREAT.
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 450. MEAN STORM
MOTION VECTOR 26025.
...HALES
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