SEL9 URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 509
NWS STORM PREDICTION CENTER NORMAN OK
400 PM EDT WED JUL 11 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHEAST GEORGIA SOUTHERN NORTH CAROLINA CENTRAL AND EASTERN SOUTH CAROLINA
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 400 PM UNTIL 900 PM EDT. HAIL TO 1.5 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 60 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST NORTHWEST OF SAVANNAH GEORGIA TO 45 MILES SOUTHEAST OF FAYETTEVILLE NORTH CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
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...ORGANIZED MULTICELL CLUSTER IS DEVELOPING NEAR THE GA/SC BORDER...AND THIS CONVECTION WILL LIKELY INCREASE IN COVERAGE THE NEXT FEW HOURS THROUGH STORM MERGERS. HOT SURFACE TEMPERATURES AND STEEP LOW-LEVEL LAPSE RATES IN ADVANCE OF THIS CONVECTION...ALONG WITH BACKGROUND FLOW OF 30-40 KT IN THE LOW TO MID LEVELS...SHOULD SUPPORT A THREAT FOR DAMAGING DOWNBURST WINDS AND MARGINALLY SEVERE HAIL ACROSS SE GA/SC AND PERHAPS INTO SRN NC THIS EVENING. THE SEVERE STORM THREAT MAY ALSO INCREASE JUST INLAND FROM THE COAST LATE THIS AFTERNOON AS CONVECTION INTERACTS WITH THE SEA BREEZE FRONT.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 26035. ...THOMPSON
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 509
NWS STORM PREDICTION CENTER NORMAN OK
400 PM EDT WED JUL 11 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHEAST GEORGIA
SOUTHERN NORTH CAROLINA
CENTRAL AND EASTERN SOUTH CAROLINA
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 400 PM UNTIL
900 PM EDT.
HAIL TO 1.5 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 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST
NORTHWEST OF SAVANNAH GEORGIA TO 45 MILES SOUTHEAST OF
FAYETTEVILLE NORTH CAROLINA. FOR A COMPLETE DEPICTION OF THE
WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
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...ORGANIZED MULTICELL CLUSTER IS DEVELOPING NEAR THE
GA/SC BORDER...AND THIS CONVECTION WILL LIKELY INCREASE IN COVERAGE
THE NEXT FEW HOURS THROUGH STORM MERGERS. HOT SURFACE TEMPERATURES
AND STEEP LOW-LEVEL LAPSE RATES IN ADVANCE OF THIS
CONVECTION...ALONG WITH BACKGROUND FLOW OF 30-40 KT IN THE LOW TO
MID LEVELS...SHOULD SUPPORT A THREAT FOR DAMAGING DOWNBURST WINDS
AND MARGINALLY SEVERE HAIL ACROSS SE GA/SC AND PERHAPS INTO SRN NC
THIS EVENING. THE SEVERE STORM THREAT MAY ALSO INCREASE JUST INLAND
FROM THE COAST LATE THIS AFTERNOON AS CONVECTION INTERACTS WITH THE
SEA BREEZE FRONT.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 26035.
...THOMPSON
Note: Click for Watch Status Reports. WOUS64 KWNS 111959
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