MESOSCALE DISCUSSION 0873
   NWS STORM PREDICTION CENTER NORMAN OK
   0710 PM CDT WED MAY 23 2007
   
   AREAS AFFECTED...PARTS OF CENTRAL/NERN KS INTO SERN NEB/NWRN MO AND
   EXTREME SWRN IA
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 290...
   
   VALID 240010Z - 240045Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 290
   CONTINUES.
   
   NEW WW WILL LIKELY BE ISSUED PRIOR TO 01Z ACROSS PARTS OF CENTRAL
   AND NERN KS.
   
   AREA OF SEVERE STORMS PERSISTS FROM MARION COUNTY KS WSWWD TO
   EDWARDS COUNTY KS OR ABOUT 30 ENE DDC.  OUTFLOW BOUNDARY FROM THIS
   ACTIVITY IS MERGING WITH THE LEADING EDGE OF MOISTURE WHICH
   CONTINUES TO RETREAT TO THE NNW ACROSS SW KS AND A COLD FRONT THAT
   HAS JUST MOVED SWD THROUGH DDC.  ASCENT/STRONGER MID LEVEL WINDS
   SPREADING EWD WITH SRN ROCKIES SHORT WAVE TROUGH WILL MAINTAIN
   LIKELIHOOD FOR ADDITIONAL TSTM DEVELOPMENT ACROSS MUCH OF SWRN TO
   CENTRAL AND NRN/NERN KS THIS EVENING THROUGH TONIGHT.  IN ADDITION
   TO A THREAT FOR HAIL AND DAMAGING WINDS...A STRENGTHENING LLJ THIS
   EVENING EXTENDING NWD INTO KS SUGGESTS A POTENTIAL FOR TORNADOES...
   ESPECIALLY NEAR ANY BOUNDARIES.  MODELS ALSO INDICATE THE LIKELIHOOD
   FOR TRAINING STORMS ACROSS PARTS OF SWRN INTO SOUTH CENTRAL/CENTRAL
   KS THIS EVENING AND THE ATTENDANT THREAT FOR HEAVY RAINFALL RATES.
   
   SEVERE THREAT FARTHER TO THE NE INTO SERN NEB...FAR SWRN IA AND NWRN
   MO IS EXPECTED TO CONTINUE FOR 1-2 HOURS BEYOND 01Z...AND THUS WW
   MAY BE LOCALLY EXTENDED IN TIME.  SHORT TERM MODELS SUGGEST THE LOSS
   OF DAYTIME HEATING WILL RESULT IN A DECREASE IN INSTABILITY INTO
   THIS AREA AS THIS REGION REMAINS JUST EAST OF A STRONGER LLJ.
   
   ..PETERS.. 05/24/2007
   
   
   ATTN...WFO...DMX...EAX...OAX...TOP...ICT...GID...DDC...
   
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