

913 

WWUS20 KWNS 291555

SEL8

SPC WW 291555

DCZ000-DEZ000-MDZ000-NJZ000-VAZ000-CWZ000-292300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 548

NWS STORM PREDICTION CENTER NORMAN OK

1155 AM EDT THU JUL 29 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       DELAWARE

       SOUTHERN AND EASTERN MARYLAND

       SOUTHERN NEW JERSEY

       MUCH OF CENTRAL AND EASTERN VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1155 AM UNTIL

700 PM EDT.



HAIL TO 1 INCH 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 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTH

SOUTHWEST OF STAUNTON VIRGINIA TO 50 MILES SOUTH SOUTHEAST OF

ATLANTIC CITY NEW JERSEY.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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.



DISCUSSION...WITH THE AIR MASS TO THE S OF COLD FRONT NOW NEAR MD/PA

BORDER BECOMING MDTLY UNSTABLE AND UNCAPPED...THUNDERSTORMS WILL

INCREASE IN NUMBER AND INTENSITY VICINITY OF THE FRONT.  WITH 30KT

OF SHEAR...COLD POOL DEVELOPMENT IS LIKELY AS STORMS FORM CLUSTERS

AND LINE SEGMENTS...RESULTING IN A WIND DAMAGE THREAT.  STORMS WILL

DEVELOP SEWD ACROSS THE WATCH THRU THE AFTERNOON.



AVIATION...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 500. MEAN STORM MOTION

VECTOR 29025.





...HALES



193 

WWUS20 KWNS 291555

SEL8

SPC WW 291555

DCZ000-DEZ000-MDZ000-NJZ000-VAZ000-CWZ000-292300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 548

NWS STORM PREDICTION CENTER NORMAN OK

1155 AM EDT THU JUL 29 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       DELAWARE

       SOUTHERN AND EASTERN MARYLAND

       SOUTHERN NEW JERSEY

       MUCH OF CENTRAL AND EASTERN VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1155 AM UNTIL

700 PM EDT.



HAIL TO 1 INCH 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 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTH

SOUTHWEST OF STAUNTON VIRGINIA TO 50 MILES SOUTH SOUTHEAST OF

ATLANTIC CITY NEW JERSEY.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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.



DISCUSSION...WITH THE AIR MASS TO THE S OF COLD FRONT NOW NEAR MD/PA

BORDER BECOMING MDTLY UNSTABLE AND UNCAPPED...THUNDERSTORMS WILL

INCREASE IN NUMBER AND INTENSITY VICINITY OF THE FRONT.  WITH 30KT

OF SHEAR...COLD POOL DEVELOPMENT IS LIKELY AS STORMS FORM CLUSTERS

AND LINE SEGMENTS...RESULTING IN A WIND DAMAGE THREAT.  STORMS WILL

DEVELOP SEWD ACROSS THE WATCH THRU THE AFTERNOON.



AVIATION...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 500. MEAN STORM MOTION

VECTOR 29025.





...HALES

