MESOSCALE DISCUSSION 0675
   NWS STORM PREDICTION CENTER NORMAN OK
   0525 PM CDT SAT MAY 02 2009
   
   AREAS AFFECTED...EXTREME NERN TX INTO SRN AR
   
   CONCERNING...HEAVY RAINFALL 
   
   VALID 022225Z - 030000Z
   
   IN ADDITION TO THE LARGE HAIL...DMGG WIND...ISOLD TORNADO
   THREATS...TRAINING VERY HEAVY RAINFALL WITH HOURLY RATES 2-3" WILL
   OCCUR THROUGH 00-01Z IN A 40 MILE CORRIDOR CENTERED FROM KTXK-20N
   KELD-KLLQ.  
   
   OUTFLOW BOUNDARY HAS SETTLED SWD TO ALONG THE LA/AR BORDER WITH
   UPDRAFTS BEING GENERATED ATOP THE COLD POOL OVER SRN AR IN AN E-W
   CORRIDOR ACROSS SRN AR.  MEANWHILE...MCV AND ASSOCD BOW ECHO WAS
   MOVING EWD AROUND 40 KTS TOWARD THE KTXK REGION.  AS THIS FEATURE
   CONTINUES EWD ALONG/N OF THE OUTFLOW BOUNDARY...RAINFALL RATES OF
   2-3 IN/HR CAN BE EXPECTED AS CELL MERGERS/TRAINING OCCUR.  RAINFALL
   EFFICIENCY WILL BE QUITE HIGH WITH PWATS IN EXCESS OF 1.5" AND THE
   TRAINING NATURE OF THE STORMS.
   
   ..RACY.. 05/02/2009
   
   
   ATTN...WFO...JAN...LZK...SHV...
   
   LAT...LON   33649458 33819197 33369146 33179181 33149334 33179461
               33649458