MESOSCALE DISCUSSION 1324
   NWS STORM PREDICTION CENTER NORMAN OK
   0321 PM CDT MON JUN 20 2011
   
   AREAS AFFECTED...CENTRAL/EASTERN OK AND NORTH-CENTRAL TX
   
   CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 
   
   VALID 202021Z - 202145Z
   
   AS A SUPPLEMENT TO EARLIER MESOSCALE DISCUSSION 1320...VISIBLE
   SATELLITE IMAGERY OVER THE PAST HOUR REFLECTS INCREASING HIGH BASED
   CU ALONG THE DRYLINE FROM WEST-CENTRAL OK SOUTHWESTWARD INTO TX NEAR
   THE ABILENE AREA. AS LARGE SCALE FORCING FOR ASCENT CONTINUES TO
   OVERSPREAD THE REGION AND REMAINING CINH WANES...IT SEEMS LIKELY
   THAT AT LEAST SCATTERED DEEP CONVECTION WILL INITIATE/INCREASE
   THROUGH THE 21Z-23Z TIMEFRAME. A WATCH WILL LIKELY BE ISSUED SHORTLY
   FOR AT LEAST PORTIONS OF CENTRAL/EASTERN OK...WITH A WATCH ALSO
   POSSIBLE ACROSS PORTIONS OF NORTH-CENTRAL TX WHERE SOMEWHAT MORE
   ISOLATED SEVERE DEVELOPMENT IS ANTICIPATED. AN INITIAL SUPERCELLULAR
   LARGE HAIL/SOME TORNADO THREAT WILL EXIST ESPECIALLY ACROSS
   OK...BEFORE A DAMAGING WIND THREAT LIKELY EVOLVES THROUGH EARLY
   EVENING.
   
   ..GUYER.. 06/20/2011
   
   
   ATTN...WFO...TSA...FWD...OUN...SJT...
   
   LAT...LON   32220009 33299922 35349816 36729781 36929673 36839596
               35939561 33549644 32369767 31839912 32220009