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WWUS20 KWNS 280457

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 248

NWS STORM PREDICTION CENTER NORMAN OK

100 AM EDT THU APR 28 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       GEORGIA

       WESTERN NORTH CAROLINA

       WESTERN AND CENTRAL SOUTH CAROLINA



EFFECTIVE THIS THURSDAY MORNING FROM 100 AM UNTIL 800 AM EDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHWEST OF

HICKORY NORTH CAROLINA TO 55 MILES SOUTHEAST OF COLUMBUS GEORGIA.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



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

241...WW 242...WW 244...WW 245...WW 246...WW 247...



DISCUSSION...SUPERCELLS ONGOING FROM THE BLUE RIDGE TO NW OF MCN

WILL CONTINUE NEWD THROUGH A MOIST AND MODERATELY UNSTABLE AIR MASS

WITH MLCAPE OF 1000-2000 J/KG.  AREA VWPS AND RUC DIAGNOSTIC DATA

INDICATE A VERY STRONGLY SHEARED ENVIRONMENT WITH EFFECTIVE SRH

VALUES AS HIGH AS 500-700 M2/S2.  AS SUCH...ENVIRONMENT WILL REMAIN

QUITE SUPPORTIVE OF LONG-LIVED SUPERCELLS CAPABLE OF SIGNIFICANT

TORNADOES...LARGE HAIL AND DAMAGING WINDS.



AVIATION...TORNADOES AND 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 24045.





...MEAD

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