MESOSCALE DISCUSSION 0999
   NWS STORM PREDICTION CENTER NORMAN OK
   0716 AM CDT TUE JUN 09 2009
   
   AREAS AFFECTED...NRN KS/SRN NEB
   
   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 
   
   VALID 091216Z - 091315Z
   
   ELEVATED TSTM COVERAGE/INTENSITY ARE EXPECTED TO INCREASE THIS
   MORNING ACROSS NRN KS INTO SRN NEB PRIOR TO THE LLJ/WAA WEAKENING
   SOME BY LATE MORNING.  ISOLATED HAIL WILL BE THE PRIMARY THREAT WITH
   THESE STORMS.
   
   REGIONAL RADARS/LIGHTNING DATA SHOWED TSTMS HAVE DEVELOPED WITHIN
   LOW LEVEL WAA REGIME/ISENTROPIC ASCENT ACROSS CENTRAL/NRN KS INTO
   SRN NEB.  11Z SURFACE ANALYSIS INDICATED A LOW PRESSURE CENTER
   LOCATED OVER SERN CO...WITH A WARM FRONT EXTENDING ESEWD THROUGH NRN
   OK TO NRN AR.  FORCING FOR ASCENT ATTENDANT TO THE EXIT REGION OF A
   SWLY 50 KT MID LEVEL JET AND THE ENTRANCE REGION OF A 45-50 KT WLY
   JET OVER SD/NEB WILL AID IN ADDITIONAL TSTM DEVELOPMENT.  AN INFLOW
   OF MODERATELY UNSTABLE AIR MASS ALONG SSWLY 30-35 KT LLJ COMBINED
   WITH EFFECTIVE BULK SHEAR OF 35-50 KT AND STEEP MID LEVEL LAPSE
   RATES WILL SUPPORT HAIL WITH THE STRONGER/SUSTAINED UPDRAFTS.
   
   ..PETERS.. 06/09/2009
   
   
   ATTN...WFO...EAX...OAX...TOP...ICT...GID...DDC...GLD...
   
   LAT...LON   38459516 38529856 38750053 39240083 39960031 40299968
               40479893 40509788 39839535 39129485 38459516