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127 

WWUS20 KWNS 300211

SEL9

SPC WW 300211

DEZ000-MDZ000-NJZ000-VAZ000-CWZ000-300600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 439

NWS STORM PREDICTION CENTER NORMAN OK

1010 PM EDT FRI JUN 29 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       DELAWARE

       EASTERN MARYLAND

       SOUTHERN NEW JERSEY

       EASTERN VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1010 PM

UNTIL 200 AM EDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

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 15 MILES EAST

NORTHEAST OF WILMINGTON DELAWARE TO 25 MILES SOUTH OF NORFOLK

VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 438...



DISCUSSION...A WELL-ORGANIZED LINE OF CONVECTION CONTINUES MOVING

QUICKLY EWD ACROSS VA/MD ATTM...WITH A VERY UNSTABLE DOWNSTREAM

AIRMASS EXTENDING TO THE COAST EXPECTED TO PERMIT THIS MCS TO REMAIN

SEVERE UNTIL MOVING OFFSHORE OVER THE NEXT FEW HOURS.  THIS MCS HAS

A HISTORY OF WIDESPREAD DAMAGING WINDS AND HAIL...AND EXPECT THE

DAMAGING WIND THREAT TO ACCOMPANY THIS SYSTEM AS IT CROSSES THE

REMAINDER OF THE MID-ATLANTIC REGION.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 29045.





...GOSS

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