

000 

WWUS20 KWNS 041809

SEL3

SPC WW 041809

DCZ000-DEZ000-MDZ000-NJZ000-PAZ000-VAZ000-WVZ000-CWZ000-050200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 483

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

       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.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.

MEAN STORM MOTION VECTOR 30035.





...CORFIDI



000 

WWUS20 KWNS 041809 CCA

SEL3

SPC WW 041809 CCA

DCZ000-DEZ000-MDZ000-NJZ000-PAZ000-VAZ000-WVZ000-CWZ000-050200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 483...CORRECTED

NWS STORM PREDICTION CENTER NORMAN OK

205 PM EDT WED JUL 4 2007



CORRECTED TO SAY MUCH OF MARYLAND INSTEAD OF MARYLAND



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       MUCH OF DELAWARE

       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.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.

MEAN STORM MOTION VECTOR 30035.





...CORFIDI



000 

WWUS20 KWNS 041809 CCB

SEL3

SPC WW 041809 CCB

DCZ000-DEZ000-MDZ000-NJZ000-PAZ000-VAZ000-WVZ000-CWZ000-050200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 483...CORRECTED

NWS STORM PREDICTION CENTER NORMAN OK

205 PM EDT WED JUL 4 2007



CORRECTED TO MUCH OF MARYLAND INSTEAD OF MARYLAND



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.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.

MEAN STORM MOTION VECTOR 30035.





...CORFIDI

