MESOSCALE DISCUSSION 0877
   NWS STORM PREDICTION CENTER NORMAN OK
   1008 PM CDT TUE MAY 26 2009
   
   AREAS AFFECTED...PORTIONS CENTRAL/NRN TX...S-CENTRAL/SERN OK NEAR
   RED RIVER.
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 312...
   
   VALID 270308Z - 270415Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 312
   CONTINUES.
   
   WW MAY BE ALLOWED TO EXPIRE AS SCHEDULED AT 04Z...EXCEPT WHERE
   LOCALLY/BRIEFLY EXTENDED.
   
   ISOLATED SVR HAIL/GUSTS WILL REMAIN POSSIBLE THROUGH REMAINDER LATE
   EVENING HOURS.  HOWEVER...OVERALL/ORGANIZED SVR POTENTIAL IS FCST TO
   DIMINISH BECAUSE OF COMBINED STABILIZING EFFECTS OF SFC DIABATIC
   COOLING AND INCREASING COVERAGE OF OUTFLOW POOLS OVER THIS REGION. 
   MOST FAVORABLE AREA FOR PERSISTENT CONVECTION MAY BE INVOF
   EWD-PROPAGATING INTERSECTION OF 1. SFC TROUGH/OUTFLOW BOUNDARY
   TRAILING SWWD FROM METROPLEX AND 2. RADIAL OUTFLOW BOUNDARY FROM
   W-CENTRAL TX COMPLEX.  THIS AREA MAINLY COMPRISES PORTIONS
   COMANCHE/MILLS/HAMILTON/CORYELL/BOSQUE COUNTIES...WHERE ENHANCED
   HEAVY RAIN THREAT ALSO EXISTS AMIDST CELL MERGERS/TRAINING NEAR
   INTERSECTING BOUNDARIES.  LOCAL 1.5-2.5 INCHES/HOUR RAIN RATES ARE
   LIKELY.  OTHERWISE...POCKETS OF MUCAPE 2000-3000 J/KG WILL LINGER
   FOR A FEW MORE HOURS WHERE AIR MASS HAS NOT BEEN CONVECTIVELY
   OVERTURNED RECENTLY...IN SUPPORT OF SPORADIC/MULTICELLULAR SVR HAIL
   AND STG GUSTS.
   
   ..EDWARDS.. 05/27/2009
   
   
   ATTN...WFO...SHV...FWD...OUN...SJT...
   
   LAT...LON   31279911 32069897 33279955 33989718 33999602 33739573
               33189542 32489588 31409688 31309745 31279911