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948 

WWUS20 KWNS 201156

SEL7

SPC WW 201156

GAZ000-NCZ000-SCZ000-201600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 167

NWS STORM PREDICTION CENTER NORMAN OK

755 AM EDT WED APR 20 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTH GEORGIA

       SOUTHWEST NORTH CAROLINA

       WESTERN SOUTH CAROLINA



EFFECTIVE THIS WEDNESDAY MORNING FROM 755 AM UNTIL NOON EDT.



HAIL TO 1 INCH 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 95

STATUTE MILES EAST AND WEST OF A LINE FROM 80 MILES NORTHWEST OF

ANDERSON SOUTH CAROLINA TO 40 MILES SOUTH SOUTHWEST OF ATLANTA

GEORGIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 165...WW 166...



DISCUSSION...FORWARD-PROPAGATING CONVECTIVE SYSTEM WITH APPARENT MCV

NOW IN NE AL /NW GA EXPECTED TO CONTINUE ENE WITHIN MODERATE WSW

FLOW MARKING SRN FRINGE OH VLY UPR VORT.  STRENGTH OF WIND

FIELD...UPSLOPE COMPONENT TO FLOW...AND PRESENCE OF MCV SUGGEST

POTENTIAL FOR CONTINUED INSTANCES OF SPORADIC DMGG WIND AND POSSIBLY

MARGINALLY SVR HAIL...DESPITE PRESENCE OF DRIER LOW-LVL AIR WITH EWD

EXTENT.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

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

VECTOR 26035.





...CORFIDI

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