SEVERE THUNDERSTORM WATCH NUMBER 438
URGENT – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 438
NWS STORM PREDICTION CENTER NORMAN OK
635 PM EDT FRI JUN 29 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
EXTREME EASTERN KENTUCKY
WESTERN MARYLAND
SOUTHWEST PENNSYLVANIA
MUCH OF VIRGINIA
SOUTHERN AND EASTERN WEST VIRGINIA
COASTAL WATERS
EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 635 PM
UNTIL 100 AM EDT.
HAIL TO 2 INCHES IN DIAMETER…THUNDERSTORM WIND GUSTS TO 80
MPH…AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 110
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTH OF
PARKERSBURG WEST VIRGINIA TO 45 MILES NORTH NORTHEAST OF RICHMOND
VIRGINIA. 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 436…WW 437…
DISCUSSION…FAST MOVING AND DAMAGING DERECHO OVER OH HAS RESULTED
IN WIDESPREAD DAMAGING WINDS. THIS SYSTEM WILL CONTINUE TO TRACK
EAST-SOUTHEASTWARD ACROSS THE WATCH AREA THIS EVENING. STORMS MAY
LOSE SOME INTENSITY AS THEY MOVE ACROSS THE APPALACHIANS…BUT MOIST
AND VERY UNSTABLE AIR MASS OVER VA SUGGESTS THAT THREAT OF AT LEAST
SCATTERED SEVERE WIND GUSTS WILL CONTINUE.
AVIATION…A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 30045.
