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230 

WWUS20 KWNS 272252

SEL1

SPC WW 272252

ALZ000-GAZ000-NCZ000-SCZ000-280600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 241

NWS STORM PREDICTION CENTER NORMAN OK

650 PM EDT WED APR 27 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN ALABAMA

       NORTHERN AND CENTRAL GEORGIA

       WESTERN NORTH CAROLINA

       UPSTATE SOUTH CAROLINA



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 650 PM

UNTIL 200 AM EDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE 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 35 MILES NORTHWEST OF HICKORY

NORTH CAROLINA TO 35 MILES EAST SOUTHEAST OF MONTGOMERY ALABAMA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 232...WW 234...WW

235...WW 236...WW 237...WW 238...WW 239...WW 240...



DISCUSSION...LONG-LIVED SUPERCELLS WITH A HISTORY OF DESTRUCTIVE

TORNADOES OVER PORTIONS OF ERN TN AND AL ARE EXPECTED TO RAPIDLY

MOVE EWD INTO THE WW AREA THIS EVENING.  EWD MIGRATION OF 50-60+ KT

LLJ AXIS WILL SUPPORT CONTINUED AIR MASS DESTABILIZATION WITH MLCAPE

VALUES REMAINING IN THE 1000-2000 J/KG RANGE.  WHEN COUPLED WITH

50-70 KT EFFECTIVE BULK SHEAR AND STEADILY STRENGTHENING LOW-LEVEL

SHEAR...SETUP WILL REMAIN QUITE SUPPORTIVE OF SIGNIFICANT

TORNADOES...SOME OF WHICH COULD BE LONG-TRACKED.



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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