MESOSCALE DISCUSSION 0420
   NWS STORM PREDICTION CENTER NORMAN OK
   0943 PM CDT THU APR 09 2009
   
   AREAS AFFECTED...SRN MO...MUCH OF AR...NRN LA...
   
   CONCERNING...TORNADO WATCH 125...126...
   
   VALID 100243Z - 100445Z
   
   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 125...126...CONTINUES.
   
   SEVERE/TORNADO THREAT CONTINUES AHEAD OF VIGOROUS BAND OF STORMS
   MOVING RAPIDLY EWD ACROSS SRN MO/AR/NWRN LA.
   
   STRONG/SEVERE STORMS CONTINUE MOVING EWD WITHIN AN ARCING BAND
   EXTENDING FROM S CENTRAL MO SWD INTO NWRN LA...AHEAD OF A VIGOROUS
   MID-LEVEL STORM SYSTEM CROSSING KS/OK.  GREATEST INSTABILITY
   PERSISTS FROM CENTRAL AR SWD INTO LA...WHERE GREATEST TORNADO
   POTENTIAL SHOULD PERSIST OVER THE NEXT FEW HOURS.  FARTHER N INTO
   NRN AR AND SRN MO...INSTABILITY DECREASES WITH NEWD EXTENT...WITH A
   WARM FRONT RETREATING VERY SLOWLY NEWD ACROSS NERN AR/SRN MO.
   
   DESPITE THE SLOW DECREASE IN INSTABILITY WITH EWD EXTENT...STRENGTH
   OF THE APPROACHING UPPER SYSTEM AND WELL-ORGANIZED NATURE OF
   CONVECTION SUGGESTS THAT STORMS WILL CONTINUE FOR SEVERAL HOURS. 
   STORMS SHOULD IMPINGE UPON ERN FRINGES OF THE WATCHES WITHIN THE
   NEXT HOUR...AND APPROACH THE MID MS VALLEY REGION TOWARD MIDNIGHT. 
   WITH A THREAT FOR MAINLY HAIL AND LOCALLY-DAMAGING WINDS LIKELY TO
   PERSIST ACROSS SERN MO/NRN AR...AND THE ADDITIONAL THREAT FOR
   ISOLATED TORNADOES ACROSS CENTRAL/SRN AR AND INTO NRN LA...A NEW WW
   MAY BE REQUIRED E OF WW 125/126.
   
   ..GOSS.. 04/10/2009
   
   
   ATTN...WFO...PAH...MEG...JAN...LSX...LZK...SGF...SHV...
   
   LAT...LON   37499244 37589163 37399019 37148947 35618991 33519122
               32289133 32329477 33479399 36059275 37089284 37499244