MESOSCALE DISCUSSION 0681
   NWS STORM PREDICTION CENTER NORMAN OK
   0830 AM CDT SUN MAY 01 2011
   
   AREAS AFFECTED...NCNTRL TX...SERN OK...SWRN AR
   
   CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON 259...260...
   
   VALID 011330Z - 011400Z
   
   ENVIRONMENTAL CONDITIONS CONTINUE FAVORABLE FOR SEVERE STORMS AND A
   WATCH ISSUANCE WILL BE COORDINATED BETWEEN THE SPC AND THE AFFECTED
   LOCAL NATIONAL WEATHER SERVICE OFFICES SHORTLY.
   
   CONVECTION HAS STRUGGLED TO ROOT SOUTH OF THE STATIONARY BOUNDARY
   WITHIN THE WARM SECTOR.  WITH WARM ADVECTION EXPECTED TO REMAIN THE
   PRIMARY FORCING MECHANISM IN UPDRAFT DEVELOPMENT FOR THE NEXT
   SEVERAL HOURS IT APPEARS THAT SEVERE TSTMS SHOULD REMAIN ALONG/NORTH
   OF WIND SHIFT.  ACTIVITY SHOULD SPREAD INTO SWRN AR SHORTLY.  WW/S
   259/260 WILL BE REPLACED TO REFLECT THIS THREAT.
   
   ..DARROW.. 05/01/2011
   
   
   ATTN...WFO...LZK...SHV...TSA...FWD...OUN...SJT...
   
   LAT...LON   33169895 35299350 33999241 32719507 31759805 33169895