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Tornado Watch 960
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WW0960 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL0
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 960
   NWS STORM PREDICTION CENTER NORMAN OK
   635 AM CST SAT DEC 27 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          WESTERN AND CENTRAL ARKANSAS
          EASTERN OKLAHOMA
   
   EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 635 AM UNTIL
   200 PM CST.
   
   TORNADOES...HAIL TO 1.5 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 120 STATUTE
   MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH NORTHEAST OF
   HARRISON ARKANSAS TO 60 MILES WEST SOUTHWEST OF DE QUEEN
   ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).
   
   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...THIS TORNADO WATCH REPLACES TORNADO
   WATCH NUMBER 956. WATCH NUMBER 956 WILL NOT BE IN EFFECT AFTER
   635 AM CST. CONTINUE...WW 957...WW 958...WW 959...
   
   DISCUSSION...BAND OF SUSTAINED TSTMS ALONG CNTRL OK COLD FRONT
   EXPECTED TO CONTINUE E INTO WRN AR BY LATE MORNING...AND INTO CNTRL
   AR BY EARLY AFTERNOON...AS ASSOCIATED UPR VORT NOW ENTERING W TX
   CONTINUES STEADILY EWD.  STRENGTHENING UVV/WIND FIELD AHEAD OF
   VORT...AND MODEST SFC HEATING...SHOULD MAINTAIN/ENHANCE ENVIRONMENT
   FAVORABLE FOR A FEW EMBEDDED SUPERCELLS.  WEAKLY CONFLUENT LOW LVL
   FLOW MAY ALSO SPAWN SEMI-DISCRETE STORMS E OF THE FRONTAL BAND. 
   STRENGTH OF LOW LVL SHEAR AND QUALITY OF MOISTURE INFLOW WILL
   SUPPORT TORNADOES...IN ADDITION TO SMALL BOWS WITH HIGH
   WIND/HAIL...GIVEN FAVORABLE STORM MODE AND EVEN MODEST SFC HEATING.
   
   AVIATION...TORNADOES AND 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 23050.
   
   
   ...CORFIDI
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Page last modified: December 27, 2008
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