MESOSCALE DISCUSSION 1183
   NWS STORM PREDICTION CENTER NORMAN OK
   0228 PM CDT SAT JUN 11 2011
   
   AREAS AFFECTED...TX/OK PANHANDLES...WRN OK
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 111928Z - 112130Z
   
   STORMS ARE EXPECTED TO BECOME SURFACE BASED LATER THIS AFTERNOON
   RESULTING IN A THREAT OF LARGE HAIL AND DAMAGING WINDS.  A WW IS
   POSSIBLE.
   
   MIDLEVEL CONVECTION IS EVIDENT IN SATELLITE AND RADAR IMAGERY OVER
   THE ERN TX PANHANDLE AND WRN OK.  MEANWHILE...BOUNDARY LAYER CUMULUS
   ARE EXPANDING IN COVERAGE ALONG THE RED RIVER AND IN THE TX
   PANHANDLE INVOF MAXIMUM LOW-LEVEL CONVERGENCE AS THE FRONT RETREATS
   NWD.  WITH CINH CONTINUING TO ERODE INTO THE
   AFTERNOON...SURFACE-BASED STORMS ARE EXPECTED TO DEVELOP IN A
   MODERATELY UNSTABLE ENVIRONMENT /MLCAPE OVER 1500 J/KG/. 
   MESOANALYSIS AND AREA PROFILERS SUGGEST DEEP-LAYER SHEAR VALUES
   AROUND 30 KTS...INDICATING THE POSSIBILITY OF MARGINAL SUPERCELL
   STRUCTURES AND ATTENDANT THREATS OF LARGE HAIL AND DAMAGING WINDS.
   
   ..JIRAK.. 06/11/2011
   
   
   ATTN...WFO...FWD...OUN...LUB...AMA...
   
   LAT...LON   34350097 34540127 34750153 35120177 35560192 35950190
               36170158 36430100 36500068 36450007 36419957 36259872
               35979806 35779764 35679745 35539708 35379681 35159658
               34949637 34689628 34569631 34339642 34129660 33919680
               33789701 33729747 33739783 33819817 33879853 34350097