MESOSCALE DISCUSSION 1706
   NWS STORM PREDICTION CENTER NORMAN OK
   0145 AM CDT FRI AUG 10 2007
   
   AREAS AFFECTED...WRN IA/ERN-NERN NEB/CENTRAL-SERN SD
   
   CONCERNING...SEVERE THUNDERSTORM WATCH 578...
   
   VALID 100645Z - 100745Z
   
   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 578
   CONTINUES.
   
   STRONG TO SEVERE WIND GUSTS REMAIN POSSIBLE ACROSS THE SRN PART OF
   WW 578 THROUGH ABOUT 07Z AS LEADING EDGE OF ERN NEB/FAR SWRN IA TSTM
   COMPLEX MOVES SEWD AT 35 KT.  UPSTREAM FROM THIS ACTIVITY...
   ADDITIONAL ISOLATED STRONG-SEVERE TSTMS WILL BE POSSIBLE THROUGH THE
   OVERNIGHT HOURS.
   
   REGIONAL RADAR IMAGERY SHOWED NRN EXTENT OF ERN NEB/WRN IA TSTM
   COMPLEX/BOW ECHO HAD WEAKENED AS IT MOVED INTO A MORE STABLE AIR
   MASS.  THE SRN EXTENT WILL CONTINUE TO TRACK SEWD ALONG THE
   INSTABILITY ALONG THE MO RIVER VALLEY THROUGH FAR SWRN IA INTO NWRN
   MO/FAR SERN NEB.  LATEST TRENDS INDICATED A DECREASE IN FORWARD
   SPEED TO AROUND 35 KT AS THE GUST FRONT CONTINUES TO OUTRUN THE
   STRONGER ACTIVITY.  THIS SUGGESTS ISOLATED STRONG TO SEVERE WIND
   GUSTS WILL REMAIN POSSIBLE.
   
   WIND PROFILERS/WSR-88D VADS IN THE PLAINS INDICATED A STRONGER SLY
   LLJ LOCATED WWD ACROSS WRN KS INTO CENTRAL NEB WHICH IS PROVIDING
   STRONGER MOIST/UNSTABLE INFLOW ATOP/NORTH OF OUTFLOW BOUNDARY
   ATTENDANT WITH ERN NEB/WRN IA COMPLEX.  GIVEN LOW LEVEL INFLOW
   RESERVOIR OF MODERATE-VERY STRONG INSTABILITY OVER KS/SRN NEB AND
   EFFECTIVE BULK SHEAR OF 50 KT FROM SD INTO ERN NEB...ADDITIONAL
   ELEVATED SUPERCELLS WILL BE LIKELY OVER NERN NEB.
   
   ..PETERS.. 08/10/2007
   
   
   ATTN...WFO...DMX...EAX...FSD...OAX...ABR...GID...LBF...UNR...
   
   42219521 40989482 40459496 40399630 40509697 41009741
   41809823 42499896 43029949 43520003 43790005 44009941
   44069864 43169738