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000 

WWUS20 KWNS 091647

SEL4

SPC WW 091647

DEZ000-MDZ000-NJZ000-CWZ000-092000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 574

NWS STORM PREDICTION CENTER NORMAN OK

1250 PM EDT THU AUG 9 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       DELAWARE

       EASTERN MARYLAND

       SOUTHERN NEW JERSEY

       COASTAL WATERS



EFFECTIVE THIS THURSDAY AFTERNOON FROM 1250 PM UNTIL 400 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 50

STATUTE MILES EITHER SIDE OF A LINE FROM 45 MILES WEST SOUTHWEST

OF WILMINGTON DELAWARE TO 50 MILES SOUTH OF ATLANTIC CITY NEW

JERSEY.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 573...



DISCUSSION...BOWING LINE OF STORMS OVER NRN MD IS EXPECTED TO

CONTINUE MOVING SEWD 30 KT WITH ATTENDANT THREAT FOR DAMAGING WIND

GUSTS AND POSSIBLE HAIL.  SYSTEM IS MOVING ALONG NRN EDGE OF

MOISTURE AND INSTABILITY GRADIENT WHERE NEAR SURFACE ELY COMPONENT

TO WINDS ARE ENHANCING VERTICAL SHEAR.



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 28030.





...WEISS

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