MESOSCALE DISCUSSION 0417
   NWS STORM PREDICTION CENTER NORMAN OK
   0621 PM CDT THU APR 09 2009
   
   AREAS AFFECTED...PORTIONS OF S-CNTRL/SERN TX
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 092321Z - 100015Z
   
   ISOLATED TSTMS HAVE RECENTLY DEVELOPED ALONG ARCING LOW-LEVEL
   MOISTURE SURGE JUST AHEAD OF APPROACHING DRYLINE. MODERATE
   INSTABILITY JUXTAPOSED WITH STRONG DEEP-LAYER SHEAR SHOULD RESULT IN
   POTENTIAL FOR LARGE HAIL AND LOCALLY DAMAGING WINDS.
   HOWEVER...OVERALL THREAT SHOULD REMAIN OVER A LIMITED AREAL/TEMPORAL
   EXTENT. THUS...A WW IS NOT ANTICIPATED ATTM.
   
   AS OF 2315Z...AN ISOLATED TSTM WAS LOCATED ALONG THE LEE/FAYETTE
   COUNTY LINES ALONG AND EAST OF A SLOWLY WWD-MOVING FINE LINE EVIDENT
   ON KEWX RADAR. THIS FINE LINE APPEARS TO BE ASSOCIATED WITH A GULF
   MOISTURE SURGE CHARACTERIZED BY MIDDLE 60S SURFACE DEW POINTS.
   FARTHER WEST...DRYLINE CONTINUES TO MARCH EWD STRETCHING FROM NEAR
   CRS TO 30 S BAZ. AN AXIS OF 1000 TO 2000 J/KG MLCAPE LOCATED ALONG
   THE DRY LINE ALONG WITH 0-6 KM SHEAR AROUND 60 KT /PER LEDBETTER TX
   PROFILER/...WILL SUPPORT POTENTIAL FOR LARGE HAIL AND LOCALLY
   DAMAGING WINDS WITH ANY SUSTAINED CONVECTIVE DEVELOPMENT.
   HOWEVER...WITH A STRONG CAPPING INVERSION FARTHER E AND BASE OF THE
   SHORT WAVE TROUGH SHIFTING E OF THIS REGION...OVERALL CONVECTIVE
   COVERAGE IS EXPECTED TO REMAIN ISOLATED AND LIKELY DIMINISH IN
   INTENSITY NEAR SUNSET.
   
   ..GRAMS.. 04/09/2009
   
   
   ATTN...WFO...HGX...FWD...EWX...
   
   LAT...LON   30929572 29869627 29199698 29219740 30009719 31229653
               31549612 31359578 30929572