Wednesday, July 4, 2007

TORNADO WATCH: UNTIL 10:00 PM





Wednesday 7/4/07
2:05 PM Until 10:00 PM

URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 483...CORRECTED NWS STORM PREDICTION CENTER NORMAN OK 205 PM EDT WED JUL 4 2007

THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF:

DISTRICT OF COLUMBIA

MUCH OF DELAWARE

MUCH OF MARYLAND

MUCH OF NEW JERSEY

SOUTHERN AND EASTERN PENNSYLVANIA

NORTHERN AND CENTRAL VIRGINIA

EASTERN WEST VIRGINIA

COASTAL WATERS


EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 205 PM UNTIL 1000 PM EDT. TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 5 MILES SOUTH SOUTHEAST OF TRENTON NEW JERSEY TO 80 MILES WEST SOUTHWEST OF MARTINSBURG WEST VIRGINIA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).


REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND 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.


OTHER WATCH INFORMATION...CONTINUE...WW 482...


DISCUSSION...TSTMS/POSSIBLE SUPERCELLS EXPECTED TO INCREASE OVER WW THIS AFTERNOON THROUGH THE EVENING AS HEATING CONTINUES IN MODERATELY SHEARED /40 KT/ ENVIRONMENT INVOF NW FLOW SHORT WAVE TROUGH. WHILE INSTABILITY WILL REMAIN FAIRLY LIMITED...SUBSTANTIAL DIRECTIONAL COMPONENT TO DEEP SHEAR WILL FAVOR A SEMI-DISCRETE MODE WITH STORMS THAT DO FORM. DECREASING LCLS AND STRENGTHENING LLJ INVOF WARM FRONT OVER ERN PA MAY ENHANCE POTENTIAL FOR LOW LVL STORM ROTATION INTO EARLY EVENING EWD INTO NJ.

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