Post by Storm Precdiction Center Olney on Jul 29, 2010 11:07:43 GMT -5
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 548
NWS STORM PREDICTION CENTER OLNEY MD 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.
SCATTERED DAMAGING WINDS
ISOLATED WIND GUSTS TO 70 MPH POSSIBLE
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.
SEVERE THUNDERSTORM WATCH NUMBER 548
NWS STORM PREDICTION CENTER OLNEY MD 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.
SCATTERED DAMAGING WINDS
ISOLATED WIND GUSTS TO 70 MPH POSSIBLE
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.