MESOSCALE DISCUSSION 1573
   NWS STORM PREDICTION CENTER NORMAN OK
   0348 PM CDT THU JUN 26 2008
   
   AREAS AFFECTED...W/CNTRL SD AND NCNTRL/WRN NEB
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 262048Z - 262215Z
   
   MESOANALYSIS PLACES AN OUTFLOW BOUNDARY ORIENTED NW-SE FROM SCNTRL
   NEB NWWD INTO SCNTRL SD.  LOW-LEVEL MOISTURE HAS BEEN INCREASING
   INVOF THIS BOUNDARY WITH SFC DEW POINTS IN THE LWR-MID 60S TO THE
   BLACK HILLS.  STRONG INSOLATION/HEATING HAS BEEN WEAKENING THE CAP
   NOTED ON 18Z RAP SOUNDING AND APPROACH OF LARGE SCALE ASCENT TIED TO
   THE MT/WY MID-LVL WAVE WILL INCREASE THE RISK FOR TSTM INITIATION
   DURING THE NEXT COUPLE OF HOURS.  INITIATION/STRENGTHENING COULD
   OCCUR IN SEVERAL AREAS...FAVORING THE HIGHER TERRAIN/BLACK
   HILLS...INVOF THE OUTFLOW BOUNDARY AND NEAR THE LEE TROUGH/DRY LINE
   AS HIGH BASED STORMS FROM ERN WY/NEB PNHDL MOVE EWD.  STRONGER DEEP
   LAYER SHEAR EXISTS GENERALLY FROM NEB/SD BORDER NWD...BUT WILL
   REMAIN SUFFICIENTLY STRONG AREAWIDE FOR SUPERCELLS WITH VERY LARGE
   HAIL.  PRIND THAT A NIGHTTIME MCS WILL EVOLVE OVER S SD/N NEB LATER
   TONIGHT AS STORMS GROW UPSCALE INTO A MOIST AIR MASS ALONG/E OF THE
   OUTFLOW BOUNDARY.
   
   ..RACY.. 06/26/2008
   
   
   ATTN...WFO...ABR...LBF...UNR...CYS...
   
   44420370 45600306 45830182 45570053 44440013 43400017
   42400021 41550056 41190134 41330231 41950325