SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 78
   NWS STORM PREDICTION CENTER NORMAN OK
   845 PM CST THU MAR 24 2005
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          NORTHERN AND WESTERN ARKANSAS
          EXTREME SOUTHEAST KANSAS
          SOUTHERN MISSOURI
   
   EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 845 PM UNTIL
   400 AM CST.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90
   STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH
   NORTHEAST OF SPRINGFIELD MISSOURI TO 35 MILES SOUTHEAST OF FORT
   SMITH ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).
   
   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 77...
   
   DISCUSSION...THUNDERSTORMS EXPECTED TO CONTINUE DEVELOPING ALONG
   NERN FRINGE OF INSTABILITY AXIS EXTENDING NNE FROM VICINITY OF FWD
   AS AREA OF STRONG MESOSCALE FORCING FOR ASCENT /ASSOCIATED WITH
   60-70 KT MID LEVEL SPEED MAX NOW OVER N CNTRL TX/ OVERSPREADS
   REGION.  ACTIVITY WILL LIKELY BECOME INCREASINGLY ELEVATED WITH
   TIME...BUT WITH A CONTINUING THREAT FOR HAIL.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
   MOTION VECTOR 25035.
   
   
   ...CORFIDI