MESOSCALE DISCUSSION 0892
   NWS STORM PREDICTION CENTER NORMAN OK
   1212 PM CDT MON MAY 23 2011
   
   AREAS AFFECTED...NE OK...SE KS...NW AR AND SW TO CNTRL MO
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 337...
   
   VALID 231712Z - 231845Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 337
   CONTINUES.
   
   THE SEVERE THREAT IN WW 337 IS EXPECTED TO BECOME INCREASINGLY
   ISOLATED AND MARGINAL OVER THE NEXT 1 TO 2 HOURS. FOR THIS
   REASON...WW 337 WILL BE ALLOWED TO EXPIRE AT 18Z.
   
   AN MCS IS CURRENTLY LOCATED ACROSS WW 337 WITH THE STRONGEST
   THUNDERSTORMS IN THE WRN PART OF WW 337 ACROSS FAR NE OK...FAR SW MO
   AND FAR NW AR. THIS ACTIVITY IS LOCATED ALONG A GRADIENT OF MODERATE
   INSTABILITY AND JUST TO THE NORTHWEST OF A 35 TO 45 KT LOW-LEVEL
   JET. AS THE LINE MOVES INTO NW AR...THE MODERATE INSTABILITY ALONG
   WITH ABOUT 40 KT OF DEEP LAYER SHEAR EVIDENT ON THE WSR-88D VWP IN
   NE OK SHOULD SUPPORT AN ISOLATED WIND DAMAGE AND HAIL THREAT.
   HOWEVER...RECENT RADAR TRENDS SUGGEST THE LINE HAS ALREADY MATURED
   AND IS OUTFLOW DOMINANT. FOR THIS REASON...THE SEVERE THREAT IS
   EXPECTED TO REMAIN ISOLATED AND SHOULD BECOME INCREASINGLY MARGINAL
   OVER THE NEXT FEW HOURS.
   
   ..BROYLES.. 05/23/2011
   
   
   ATTN...WFO...PAH...MEG...LSX...LZK...SGF...TSA...ICT...
   
   LAT...LON   35749081 35599320 35749458 36109557 36439591 36919582
               37229546 37309466 37379430 37469379 37999308 38319288
               38499251 38369197 38009150 37329084 36389036 35949037
               35749081