MESOSCALE DISCUSSION 0937
   NWS STORM PREDICTION CENTER NORMAN OK
   0120 PM CDT WED JUN 03 2009
   
   AREAS AFFECTED...PARTS OF ERN TX / FAR WRN LA
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 031820Z - 031915Z
   
   EXPECTING SCATTERED TO NUMEROUS TSTM COVERAGE THIS AFTERNOON.  ISOLD
   STRONG/SEVERE WIND GUSTS AND LARGE HAIL MAY OCCUR WITH THE MORE
   INTENSE STORMS.
   
   LATEST VISIBLE IMAGERY/SURFACE ANALYSIS COMPOSITE SHOW A MCV NEAR
   TYR WITH A REMNANT OUTFLOW BOUNDARY EXTENDING FROM PARTS OF SERN AR
   TO 25 MI SSE GGG...WITH THE AFOREMENTIONED FEATURE INTERSECTING A
   PREFRONTAL SURFACE WIND SHIFT EXTENDING S TOWARDS GALVESTON BAY. 
   THE LOW LEVEL PREFRONTAL CONFLUENCE ZONE IS PROVIDING A FOCUSED AREA
   OF LOW LEVEL CONVERGENCE--LIKELY AIDING IN TSTM DEVELOPMENT FROM
   NEAR GGG SSWWD TO LBX WHERE SEA BREEZE CIRCULATIONS ARE PROVIDING
   ADDITIONAL SUPPORT FOR CONVECTION.  
   
   MODIFYING LCH/SHV 12Z RAOBS FOR LOW 80S TEMP / NEAR 70 DEWPOINT
   INDICATE A VERY UNSTABLE AIRMASS HAS DEVELOPED WITH MLCAPE VALUES
   AROUND 2500 J/KG.  ADDITIONALLY...THE MORNING AREA RAOBS DISPLAYED A
   PRONOUNCED MID-LEVEL DRY LAYER ALONG WITH SEASONABLY HIGH
   PRECIPITABLE WATER VALUES UP TO 1.75 INCH.  THIS ALL SEEMS TO
   SUPPORT PULSE-LIKE TSTM MODE WITH THE MORE INTENSE STORMS BEING
   CAPABLE OF ISOLD WET MICROBURSTS AND LARGE HAIL.
   
   ..SMITH.. 06/03/2009
   
   
   ATTN...WFO...LCH...SHV...HGX...FWD...
   
   LAT...LON   31439537 32079554 32869453 32989388 32479314 31609322
               30799346 29839383 29359455 28999541 29099574 29549556
               30629518 31439537