MESOSCALE DISCUSSION 1912
   NWS STORM PREDICTION CENTER NORMAN OK
   0446 PM CDT TUE AUG 18 2009
   
   AREAS AFFECTED...ERN CO/NM...WRN KS/OK/TX PANHANDLES
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 709...
   
   VALID 182146Z - 182245Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 709
   CONTINUES.
   
   STRONG/SEVERE THUNDERSTORMS WILL GRADUALLY SPREAD ACROSS THE
   SRN/CNTRL HIGH PLAINS OF CO/NM INTO WRN KS/OK/TX PANHANDLES OVER THE
   NEXT FEW HOURS.  NEW SEVERE THUNDERSTORM WATCH WILL LIKELY BE ISSUED
   SOON TO ACCOUNT FOR THIS SCENARIO.
   
   SCATTERED SUPERCELLS ACROSS THE HIGH PLAINS...AND AN EVOLVING SQUALL
   LINE OVER CO...WILL GRADUALLY SPREAD OFF THE HIGHER TERRAIN TOWARD
   GLD/DDC/AMA REGION.  ALTHOUGH ONGOING CONVECTION HAS EVOLVED WITHIN
   GREATEST INSTABILITY AXIS...AIRMASS DOWNSTREAM REMAINS SUFFICIENTLY
   BUOYANT FOR MAINTENANCE OF ROBUST UPDRAFTS GIVEN THE STRONG VERTICAL
   SHEAR.  ADDITIONALLY...LLJ IS EXPECTED TO INCREASE MARKEDLY ACROSS
   THE TX PANHANDLE INTO WRN KS THIS EVENING WHICH FAVORS LONGEVITY
   WITH THIS ACTIVITY.  LARGE HAIL AND DAMAGING WINDS ARE THE PRIMARY
   THREATS.
   
   ..DARROW.. 08/18/2009
   
   
   ATTN...WFO...DDC...GLD...AMA...PUB...BOU...ABQ...
   
   LAT...LON   34970354 39940309 39750054 34950126 34970354