

694 

WWUS20 KWNS 041844

SEL2

SPC WW 041844

GAZ000-NCZ000-SCZ000-CWZ000-050000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 242

NWS STORM PREDICTION CENTER NORMAN OK

240 PM EDT MON MAY 4 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN AND EASTERN GEORGIA

       SOUTHEAST NORTH CAROLINA

       MIDLANDS AND EASTERN SOUTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 240 PM UNTIL 800

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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST

SOUTHWEST OF AUGUSTA GEORGIA TO 30 MILES SOUTH SOUTHEAST OF

WILMINGTON NORTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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.



OTHER WATCH INFORMATION...CONTINUE...WW 238...WW 239...WW

240...WW 241...



DISCUSSION...CLUSTER OF STORMS ACROSS EASTERN GA ASSOCIATED WITH

REMNANT MCV APPEAR TO BE INCREASING WITHIN INSTABILITY GRADIENT

ACROSS LOWER SAVANNAH RIVER VALLEY. EXPECT THIS ACTIVITY TO MOVE

INTO SC THIS AFTERNOON COINCIDENT WITH INCREASE IN DEEP-LAYER SHEAR

SUFFICIENT FOR PERSISTENT UPDRAFTS. MEANWHILE...STORMS ALONG LEE

TROUGH AND SEA BREEZE BOUNDARIES ACROSS SERN NC WILL POSE SOME

THREAT OF HAIL/WIND EARLY BEFORE MOVING NEWD INTO WW 241.

HOWEVER...IT APPEARS THAT UPSCALE DEVELOPMENT OF STORMS ACROSS SC

MAY BEGIN TO AFFECT PORTIONS OF UPSTATE SC AND SERN NC LATE TODAY.



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 450. MEAN STORM

MOTION VECTOR 26025.





...CARBIN

