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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 269

NWS STORM PREDICTION CENTER NORMAN OK

200 PM EDT WED MAY 9 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN GEORGIA

       SOUTHEAST SOUTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 200 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 35

STATUTE MILES EITHER SIDE OF A LINE FROM 30 MILES NORTH NORTHEAST

OF CHARLESTON SOUTH CAROLINA TO 55 MILES SOUTHWEST OF SAVANNAH

GEORGIA.  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...A BAND OF TSTMS...INCLUDING A BOWING SEGMENT...HAS

EVOLVED OVER THE LOWER SAVANNAH RIVER VALLEY THIS AFTERNOON.  INFLOW

AIR MASS IS WARM AND MOIST WITH MLCAPE OF 1000-2000 J/KG.  THIS

INSTABILITY COUPLED WITH FORCING FOR ASCENT ATTENDANT TO A WEAK

MIDLEVEL IMPULSE MOVING ACROSS THE REGION SHOULD SUSTAIN ONGOING

STORMS EWD ACROSS THE WATCH AREA.  ADDITIONAL STORMS ARE EXPECTED TO

DEVELOP INVOF THE COAST ALONG SEA BREEZE CIRCULATION.  WHILE

DAMAGING WINDS APPEAR TO BE THE PRIMARY HAZARD...SOME HAIL IS ALSO

POSSIBLE WITH THE STRONGEST STORMS.



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 27025.





...MEAD

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