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Monday, October 25, 2010

Tornado Watch for Western North Carolina
Updated with Mesoscale Discussion #1985


From the Storm Prediction Center in Norman, Oklahoma.





URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 712
   NWS STORM PREDICTION CENTER NORMAN OK
   535 AM EDT MON OCT 25 2010
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          CENTRAL AND NORTHERN GEORGIA
          WESTERN NORTH CAROLINA
          WESTERN SOUTH CAROLINA
          EAST TENNESSEE
   
   EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 535 AM UNTIL 100
   PM EDT.
   
   TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
   TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
   MILES EAST AND WEST OF A LINE FROM 25 MILES EAST NORTHEAST OF
   KNOXVILLE TENNESSEE TO 45 MILES SOUTHEAST OF COLUMBUS GEORGIA. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU2).
   
   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 711...
   
   DISCUSSION...ERN AL SQLN WITH EMBEDDED SUPERCELLS SHOULD CONTINUE
   GENERALLY ENE INTO GA AND THE SRN APPALACHIANS THROUGH LATER THIS
   MORNING.  WHILE BOUNDARY LAYER ACROSS THAT REGION IS NOT AS
   WARM/MOIST AS IN AL...COMBINATION OF ELEVATED TERRAIN...EXPECTED MID
   LVL COOLING AHEAD OF W TN/NRN MS UPR VORT...AND STRENGTH OF LOW TO
   MID LVL WIND FIELD SUGGEST CONTINUED RISK FOR SUSTAINED
   STORMS/SUPERCELLS POSING A RISK FOR LOCALLY DMGG WIND AND ISOLD
   TORNADOES.  A THREAT FOR ISOLD SVR WEATHER ALSO WILL EXIST WITH ANY
   SUSTAINED STORMS THAT MIGHT EVOLVE ALONG AXIS OF CONFLUENCE E OF
   SQLN IN ERN AL.
   
   AVIATION...TORNADOES AND 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 450.
   MEAN STORM MOTION VECTOR 23035.
   






TORNADO WATCH OUTLINE UPDATE FOR WT 712
NWS STORM PREDICTION CENTER NORMAN OK
535 AM EDT MON OCT 25 2010


TORNADO WATCH 712 IS IN EFFECT UNTIL 100 PM EDT FOR THE
FOLLOWING LOCATIONS


NCC021-039-043-075-087-089-099-113-115-173-175-251700-
/O.NEW.KWNS.TO.A.0712.101025T0935Z-101025T1700Z/


NC
. NORTH CAROLINA COUNTIES INCLUDED ARE


BUNCOMBE CHEROKEE CLAY
GRAHAM HAYWOOD HENDERSON
JACKSON MACON MADISON
SWAIN TRANSYLVANIA
$$


Visit the National Weather Service for more up to date information on this storm system.


**6.15am**








   MESOSCALE DISCUSSION 1985
   NWS STORM PREDICTION CENTER NORMAN OK
   0407 AM CDT MON OCT 25 2010
   
   AREAS AFFECTED...AL/WRN GA
   
   CONCERNING...TORNADO WATCH 711...
   
   VALID 250907Z - 251100Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 711 CONTINUES.
   
   BROKEN LINE OF STRONG/SEVERE STORMS CONTINUES MOVING QUICKLY EWD
   ACROSS AL ATTM...FUELED BY 500 TO 1000 J/KG MIXED-LAYER CAPE IN
   PLACE AHEAD OF THE CONVECTION PER LATEST OBJECTIVE ANALYSIS. 
   STRONG/VEERING FLOW WITH HEIGHT CONTINUES TO SUPPORT ORGANIZED
   STORMS -- WITH A FEW AREAS OF OCCASIONAL EMBEDDED ROTATION INDICATED
   WITHIN THE LINE.  MAIN THREAT WILL REMAIN DAMAGING WINDS...THOUGH
   BRIEF/ISOLATED TORNADOES WILL REMAIN POSSIBLE.
   
   INSTABILITY WANES WITH EWD EXTENT INTO GA...AND THUS WOULD EXPECT AN
   EVENTUAL/SLOW DECREASE IN CONVECTIVE ACTIVITY AS IT CROSSES INTO WRN
   GA.  HOWEVER...GIVEN WELL-ORGANIZED NATURE OF THE CONVECTIVE
   LINE...SOME SEVERE THREAT MAY LINGER E OF THE CURRENT ERN EDGE OF
   THE WATCH -- WHICH COULD REQUIRE EITHER A LOCAL WW EXTENSION OR NEW
   WW ISSUANCE IN THE NEXT 1-2 HOURS.
   
   ..GOSS.. 10/25/2010





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