

889 

WWUS20 KWNS 222057

SEL4

SPC WW 222057

DEZ000-MDZ000-NJZ000-PAZ000-CWZ000-230100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 384

NWS STORM PREDICTION CENTER NORMAN OK

500 PM EDT TUE JUN 22 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF NORTHERN DELAWARE

       PARTS OF NORTHEASTERN MARYLAND

       CENTRAL AND SOUTHERN NEW JERSEY

       SOUTHEAST PENNSYLVANIA

       COASTAL WATERS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 500 PM UNTIL

900 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 40

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES NORTHWEST

OF WILMINGTON DELAWARE TO 30 MILES EAST NORTHEAST 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 381...WW 382...WW 383...



DISCUSSION...STRONG/SEVERE THUNDERSTORMS MOVING OVER SERN PA IN AREA

OF FAVORABLE SHEAR PROFILES AND MDT INSTABILITY.  POTENTIAL FOR

DAMAGING WINDS AND LARGE HAIL WILL ACCOMPANY STORMS EWD TO COAST



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 24025.





...HALES

