MESOSCALE DISCUSSION 1351
   NWS STORM PREDICTION CENTER NORMAN OK
   0904 PM CDT TUE JUN 21 2011
   
   AREAS AFFECTED...SERN OK...W-CNTRL AR
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 536...
   
   VALID 220204Z - 220300Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 536
   CONTINUES.
   
   ISOLATED SEVERE THREAT MAY PERSIST NEXT COUPLE OF HOURS WITH
   DISCRETE CELL CENTERED OVER PARTS OF POLK/SCOTT/MONTGOMERY COUNTIES
   AR AS OF 0155Z. THIS CELL HAS SHIFTED E OF QUASI-STATIONARY FRONT
   FROM NEAR GYI TO RKR TO UNO. LAST FEW VISIBLE SATELLITE IMAGES
   INDICATE CU FIELD HAS DIMINISHED ALONG THE FRONT IN SERN OK. WITH A
   PRIMARILY DIVERGENT LOW-LEVEL FLOW REGIME...ADDITIONAL TSTM
   DEVELOPMENT ALONG THE FRONT APPEARS UNLIKELY. AS A RESULT...THE
   OVERALL SEVERE THREAT SHOULD BECOME INCREASINGLY LOCALIZED.
   
   ..GRAMS.. 06/22/2011
   
   
   ATTN...WFO...LZK...SHV...TSA...
   
   LAT...LON   34909308 34519274 34249281 33919327 33899385 33949454
               34199474 34889437 35179389 35269357 34909308