MESOSCALE DISCUSSION 0710
   NWS STORM PREDICTION CENTER NORMAN OK
   0306 PM CDT TUE MAY 05 2009
   
   AREAS AFFECTED...PARTS OF W-CNTRL AND W N-CNTRL TX
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 052006Z - 052100Z
   
   TSTM INITIATION/SEVERE POTENTIAL INCREASING.  CONVECTIVE INITIATION
   POSSIBLE BY LATE AFTERNOON.
   
   RECENT SURFACE MESOANALYSIS SHOWS A TRIPLE POINT FEATURE 55 MI W ABI
   WITH A N-S DRYLINE AND A WARM FRONT ELONGATED IN A GENERAL W-E
   ORIENTATION THROUGH THE DFW METROPLEX.  A LOCALIZED PRESSURE FALL
   MAXIMA HAS BEEN OBSERVED /1-2 MB PER HR/ TO THE E OF THE TRIPLE
   POINT.  A LOW LEVEL THERMAL RIDGE /STEEPENING 0-2 KM LAPSE RATE
   PLUME/ EXTENDING NEWD TOWARDS THIS FEATURE...ALONG WITH ENHANCED LOW
   LEVEL CONVERGENCE INVOF WARM FRONT MAY BE ENOUGH TO BREAK A WEAKENED
   CAP OVER THIS AREA.  
   
   VERY UNSTABLE AIRMASS /AOA 2500 J/KG MLCAPE/...SIZEABLE CLOCKWISE
   CURVED LOW LEVEL HODOGRAPHS /PER DYX VWP/ BENEATH MORE THAN ADEQUATE
   DEEP FLOW ALOFT WILL PROMOTE RAPID SUPERCELL DEVELOPMENT IF A STORM
   INITIATES.  VERY LARGE HAIL WILL BE A DISTINCT
   POSSIBILITY...INCLUDING THE POTENTIAL FOR TORNADO/S...ALONG WITH
   DMGG WIND GUSTS.  IF/ONCE STORM INITIATION APPEARS IMMINENT...A WW
   WILL BE NEEDED.
   
   ..SMITH.. 05/05/2009
   
   
   ATTN...WFO...FWD...SJT...LUB...
   
   LAT...LON   31579970 31910043 32660042 33010007 33289950 33319854
               33009802 32509813 32149875 31579970