MESOSCALE DISCUSSION 1422
   NWS STORM PREDICTION CENTER NORMAN OK
   0920 PM CDT FRI JUL 03 2009
   
   AREAS AFFECTED...CENTRAL AND SERN NEB/NORTH CENTRAL KS
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 542...
   
   VALID 040220Z - 040315Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 542
   CONTINUES.
   
   SEVERE WEATHER THREAT EXPECTED TO CONTINUE ACROSS SRN NEB AND NRN KS
   /SRN EXTENT OF WW 542/...WHERE A MODERATELY UNSTABLE AIR MASS AND
   STRONG EFFECTIVE SHEAR WILL MAINTAIN THE POTENTIAL FOR SEVERE
   STORMS.  ALTHOUGH STRONGEST ACTIVITY IS GENERALLY LOCATED IN NRN
   KS...A STRONG STORM HAD RECENTLY MOVED INTO FAR SOUTH CENTRAL NEB
   /HARLAN COUNTY/ PER REGIONAL RADAR IMAGERY.  A STRENGTHENING SLY LLJ
   EXTENDING INTO NORTH CENTRAL/NERN KS AND ADJACENT SOUTH CENTRAL/SERN
   NEB IS EXPECTED TO SUPPORT STRONG LOW LEVEL MASS CONVERGENCE AND
   WARM AIR ADVECTION ACROSS THESE PARTS OF NEB/KS.  00Z RUC SUPPORTS
   THIS SCENARIO WITH ADDITIONAL TSTMS DEVELOPING INTO THE LATE
   EVENING.  AS THE BOUNDARY LAYER UNDERGOES FURTHER STABILIZATION...
   ELEVATED TSTMS PRODUCING PRIMARILY A HAIL THREAT SHOULD BECOME THE
   PRIMARY STORM MODE.
   
   FARTHER N INTO CENTRAL NEB /NW TO NRN PORTION OF WW 542/...LACK OF
   STRONGER SLY LOW LEVEL INFLOW INTO THIS REGION HAS AIDED IN
   STABILIZING THE AIR MASS AND LIMITING THE THREAT FOR ADDITIONAL
   SEVERE STORMS.  CENTRAL PORTIONS OF NEB MAY BE CANCELLED PRIOR TO
   THE 05Z EXPIRATION...NORTH OF A LINE FROM LINCOLN COUNTY TO HOWARD
   COUNTY.
   
   ..PETERS.. 07/04/2009
   
   
   ATTN...WFO...EAX...OAX...TOP...ICT...GID...LBF...DDC...GLD...
   
   LAT...LON   40059994 40320023 40340205 40700195 40770113 40840028
               41079909 41639838 41379684 40659572 39999526 40019801
               39229797 39149854 39119962 40019958 40059994