MESOSCALE DISCUSSION 1346
   NWS STORM PREDICTION CENTER NORMAN OK
   0621 PM CDT TUE JUN 21 2011
   
   AREAS AFFECTED...N-CNTRL/NERN TX...SERN OK...WRN AR
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 534...
   
   VALID 212321Z - 220015Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 534
   CONTINUES.
   
   AREA ALONG QUASI-STATIONARY FRONT NE OF WW 534 IS BEING MONITORED
   FOR A PROBABLE SEVERE TSTM WATCH ISSUANCE INTO PARTS OF WRN AR.
   
   23Z SUBJECTIVE SURFACE ANALYSIS PLACED A QUASI-STATIONARY FRONT FROM
   NEAR HRO TO GYI TO 20 S MWL. TCU/SMALL CBS HAVE GRADUALLY INCREASED
   ACROSS PARTS OF SERN OK TO W-CNTRL AR WITHIN A WEAKLY CONVERGENT
   ENVIRONMENT...AIDED BY A GRAVITY WAVE THAT EMANATED WWD FROM
   SWD-SINKING TSTM CLUSTER OVER NERN/E-CNTRL TX. AIR MASS HAS BECOME
   STRONGLY UNSTABLE ALONG THE COLD FRONT WITH MLCAPE OF 2000 TO 3000
   J/KG COMMON. 40-50 KT MID-LEVEL WLYS SAMPLED IN THE HASKELL OK AND
   DE QUEEN AR WIND PROFILERS WILL BE FAVORABLE FOR ROTATING UPDRAFTS
   AND ATTENDANT THREATS FOR LARGE HAIL AND ISOLATED DAMAGING WINDS.
   
   ..GRAMS.. 06/21/2011
   
   
   ATTN...WFO...LZK...SHV...TSA...FWD...OUN...
   
   LAT...LON   32699810 33739659 35479404 35809315 35769268 35399261
               34799301 33729426 32799539 32349628 32209777 32699810