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WWUS20 KWNS 051724

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SPC WW 051724

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 348

NWS STORM PREDICTION CENTER NORMAN OK

125 PM EDT TUE JUN 5 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST FLORIDA

       SOUTHERN AND CENTRAL GEORGIA

       COASTAL SOUTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 125 PM UNTIL

800 PM EDT.



HAIL TO 2 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 90

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

SOUTHWEST OF ALBANY GEORGIA TO 40 MILES SOUTHEAST OF SAVANNAH

GEORGIA.  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.



OTHER WATCH INFORMATION...CONTINUE...WW 347...



DISCUSSION...SEVERAL BANDS OF STRONG/SEVERE STORMS WILL DEVELOP

DURING THE AFTERNOON ALONG A WEAK SURFACE TROUGH AND OUTFLOW

BOUNDARIES FROM MORNING CONVECTION.  CONVECTIVE COVERAGE WILL BE

AIDED BY A SERIES OF WEAK MCV/S APPROACHING THIS AREA FROM THE W.

THE COMBINATION OF MODERATE INSTABILITY AND RELATIVELY STRONG DEEP

LAYER SPEED SHEAR SHOULD SUPPORT BOTH LEFT AND RIGHT MOVING

SUPERCELLS CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS.  THE

SEVERE THREAT MAY BE ENHANCED LOCALLY NEAR THE COAST WHERE STORMS

INTERACT WITH THE SEA BREEZE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 27030.





...THOMPSON

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