

648 

WWUS20 KWNS 110540

SEL6

SPC WW 110540

SCZ000-CWZ000-110900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 276

NWS STORM PREDICTION CENTER NORMAN OK

140 AM EDT WED MAY 11 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN SOUTH CAROLINA

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY MORNING FROM 140 AM UNTIL 500 AM 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 EAST AND WEST OF A LINE FROM 45 MILES NORTH

NORTHEAST OF FLORENCE SOUTH CAROLINA TO 55 MILES SOUTH SOUTHWEST

OF MYRTLE BEACH SOUTH CAROLINA.  FOR A COMPLETE DEPICTION OF THE

WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 273...WW 274...WW 275...



DISCUSSION...SMALL BOWING MCS IS MOVING SEWD ALONG LOW-LEVEL

BAROCLINIC ZONE AT 45-50 KT.  GIVEN A MOIST AND MODERATELY UNSTABLE

AIR MASS IN PLACE DOWNSTREAM ACROSS WW AREA...EXPECT SYSTEM TO

CONTINUE TOWARD THE COAST.  WHILE DAMAGING WINDS WILL BE THE PRIMARY

HAZARD...SOME SEVERE HAIL WILL ALSO BE POSSIBLE.



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 33045.





...MEAD

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