SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 864
   NWS STORM PREDICTION CENTER NORMAN OK
   705 AM CST TUE NOV 15 2005
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          WESTERN ARKANSAS
          SOUTHWEST AND SOUTH CENTRAL MISSOURI
          EXTREME EAST CENTRAL AND SOUTHEAST OKLAHOMA
          EXTREME NORTHEAST TEXAS
   
   EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 705 AM UNTIL 300
   PM CST.
   
   TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE MILES
   EAST AND WEST OF A LINE FROM 30 MILES EAST NORTHEAST OF
   SPRINGFIELD MISSOURI TO 40 MILES SOUTHWEST OF TEXARKANA ARKANSAS. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU4).
   
   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.
   
   DISCUSSION...THUNDERSTORMS WILL INCREASE IN COVERAGE/INTENSITY ALONG
   AND E OF THE COLD FRONT SURGING SEWD ACROSS ERN OK AND N TX. 
   MODERATE INSTABILITY AND STRONG VERTICAL SHEAR E OF THE FRONT WILL
   SUPPORT A THREAT FOR BOTH SUPERCELLS IN THE WARM SECTOR...AND
   BOWS/EMBEDDED SUPERCELLS WITHIN A DEVELOPING FRONTAL SQUALL LINE
   LATER THIS MORNING.  A FEW TORNADOES...DAMAGING WINDS...AND ISOLATED
   LARGE HAIL WILL ALL BE POSSIBLE.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   450. MEAN STORM MOTION VECTOR 24040.
   
   
   ...THOMPSON