SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 74
   NWS STORM PREDICTION CENTER NORMAN OK
   1245 PM CST SUN MAR 12 2006
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          NORTHERN ARKANSAS
          SOUTHERN MISSOURI
          PARTS OF CENTRAL AND EASTERN OKLAHOMA
   
   EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1245 PM UNTIL
   1000 PM CST.
   
   ...THIS IS A PARTICULARLY DANGEROUS SITUATION...
   
   DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 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 65 STATUTE MILES
   NORTH AND SOUTH OF A LINE FROM 30 MILES WEST NORTHWEST OF CHANDLER
   OKLAHOMA TO 45 MILES NORTHEAST OF BATESVILLE 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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 73...
   
   DISCUSSION...SEVERE THUNDERSTORMS EXPECTED TO DEVELOP RAPIDLY ALONG
   DRY LINE CURRENTLY N/S THRU CENTRAL OK.  VERY STRONG DEEP LAYER
   SHEAR...STEEP LAPSE RATES AND MLCAPES ABOVE 2000 J/KG  SUPPORT
   TORNADIC SUPERCELLS. IN ADDITION TO VERY LARGE HAIL... STRONG TO
   VIOLENT TORNADOES ARE POSSIBLE LATER THIS AFTERNOON AND EVENING. 
   STORMS WILL MOVE RAPIDLY EWD ACROSS OK INTO NORTHWEST AR BY LATE
   AFTERNOON.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE WIND
   GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550.
   MEAN STORM MOTION VECTOR 24040.
   
   
   ...HALES