MESOSCALE DISCUSSION 1222
   NWS STORM PREDICTION CENTER NORMAN OK
   0702 PM CDT TUE JUN 14 2011
   
   AREAS AFFECTED...NORTHEAST/CENTRAL/SOUTHWEST OK AND FAR NWRN TX
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 476...
   
   VALID 150002Z - 150100Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 476
   CONTINUES.
   
   STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE
   ALONG OR JUST AHEAD OF A SLOW SEWD MOVING COLD FRONT...WHICH
   STRETCHED FROM OSAGE COUNTY...OK SWWD THROUGH OKC TO NEAR LTS.
   DESPITE RELATIVELY LARGE TEMPERATURE/DEWPOINTS SPREADS...ESPECIALLY
   ACROSS SWRN OK AND FAR NWRN TX...STEEP MID/HIGH LEVEL LAPSE RATES
   WERE RESULTING IN MUCAPES FROM 1500-2500 J/KG AHEAD OF THE FRONT.
   THE FRONTAL CONVERGENCE COMBINED WITH AN UPPER LEVEL TROUGH MOVING
   INTO THE AREA IS EXPECTED TO RESULT IN THUNDERSTORMS BECOMING
   NUMEROUS ALONG THE LENGTH OF THE FRONT WITHIN THE NEXT COUPLE OF
   HOURS. THE WELL MIXED AND DEEP BOUNDARY LAYER COMBINED WITH STRONG
   UPDRAFTS SHOULD RESULT IN DAMAGING WINDS...WHICH MAY INCREASE AS THE
   STORM OUTFLOWS CONGEAL AND A LINEAR SYSTEM EVENTUALLY DEVELOPS. THE
   THERMODYNAMIC PROFILES ARE ALSO SUPPORTIVE OF HAIL...ESPECIALLY IN
   THE MORE DISCRETE STORMS.
   
   ..IMY.. 06/15/2011
   
   
   ATTN...WFO...SGF...TSA...FWD...OUN...
   
   LAT...LON   33689995 34619947 35909759 36669617 36969514 36829425
               35239594 34159754 33659809 33689995