MESOSCALE DISCUSSION 0961
   NWS STORM PREDICTION CENTER NORMAN OK
   0338 PM CDT SAT JUN 06 2009
   
   AREAS AFFECTED...PORTIONS OF WRN TX INTO SWRN OK
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 062038Z - 062215Z
   
   ISOLATED HIGH-BASED TSTMS WILL CONTINUE TO DEVELOP INVOF A DRY LINE
   FROM THE RED RIVER AREA OF SERN TX PANHANDLE/SWRN OK TOWARDS THE
   PECOS VALLEY. STEEP LOW/MID-LEVEL LAPSE RATES WILL PROMOTE POTENTIAL
   FOR SEVERE HAIL AND WIND AMIDST A MODERATE /BUT INCREASING/ ZONE OF
   DEEP-LAYER SHEAR. CONVECTIVE COVERAGE CONCERNS MAKE WW ISSUANCE
   UNCERTAIN IN THE NEAR-TERM...HOWEVER OBSERVATIONAL TRENDS WILL
   CONTINUE TO BE MONITORED.
   
   20Z SUBJECTIVE SURFACE ANALYSIS PLACED DRY LINE FROM AROUND 40 E DDC
   TO 30 E LBB TO 20 E INK. RECENT VISIBLE SATELLITE AND RADAR IMAGERY
   CONFIRM GROWING CB/TCU ALONG THE DRY LINE IN WRN TX ALONG THE
   CAPROCK THROUGH THE PERMIAN BASIN. AIR MASS ALONG AND EAST OF THE
   DRY LINE CONSISTS OF SURFACE TEMPERATURES FROM 95 TO 100 F AND DEW
   POINTS INTO THE 50S...INDICATIVE OF A DEEPLY-MIXED BOUNDARY LAYER
   WITH STEEP LOW/MID-LEVEL LAPSE RATES. ALTHOUGH MID-LEVEL FLOW SHOULD
   REMAIN MODEST /AROUND 20 KT AT 500 MB/...LOWER-LEVEL SLYS WILL
   STRENGTHEN /ESPECIALLY AROUND AND AFTER 00Z/ IN RESPONSE TO
   UPPER-LEVEL IMPULSE APPROACHING THE FOUR CORNERS AND NOCTURNAL LLJ
   DEVELOPMENT. THIS MAY PROVIDE A RELATIVELY SHORT WINDOW OF MORE
   ORGANIZED HAIL/WIND POTENTIAL WITH A FEW HIGH-BASED SUPERCELLS PRIOR
   TO THE LOSS OF DAYTIME HEATING AND STRENGTHENING CAPPING INVERSION.
   
   ..GRAMS.. 06/06/2009
   
   
   ATTN...WFO...OUN...SJT...LUB...AMA...MAF...
   
   LAT...LON   33950121 34900053 35239987 35169935 34699900 34249912
               33249962 31830073 30930158 30540232 30760285 31270292
               33950121