324  
ACUS11 KWNS 190026  
SWOMCD  
SPC MCD 190025  
SDZ000-190230-  
 
MESOSCALE DISCUSSION 1990  
NWS STORM PREDICTION CENTER NORMAN OK  
0725 PM CDT MON AUG 18 2025  
 
AREAS AFFECTED...SOUTH DAKOTA  
 
CONCERNING...SEVERE THUNDERSTORM WATCH 600...  
 
VALID 190025Z - 190230Z  
 
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 600  
CONTINUES.  
 
SUMMARY...ISOLATED SEVERE THUNDERSTORMS WILL LINGER THIS EVENING.  
 
DISCUSSION...WEAK SHORT-WAVE TROUGH HAS TOPPED THE RIDGE AND IS  
DIGGING SOUTHEAST ACROSS EASTERN ND/NORTHERN SD. THIS FEATURE  
APPEARS TO BE AIDING ISOLATED THUNDERSTORMS ACROSS NORTHWESTERN SD  
EARLY THIS EVENING. LATEST SURFACE ANALYSIS SUGGESTS THIS ACTIVITY  
TRAILS THE MAIN WIND SHIFT, BUT IS DIGGING SOUTHEAST WITHIN A STEEP  
LAPSE-RATE ENVIRONMENT CHARACTERIZED BY MLCAPE ON THE ORDER OF 2000  
J/KG. EVEN SO, MRMS DATA SUGGESTS HAIL CORES HAVE WEAKENED A BIT  
OVER THE LAST HALF HOUR OR SO. HAIL AND WIND CONTINUE TO BE A  
CONCERN WITH THESE ISOLATED ROBUST UPDRAFTS.  
 
..DARROW.. 08/19/2025  
   
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT  
 
ATTN...WFO...ABR...UNR...  
 
LAT...LON 43280331 45740332 45779972 43319971 43280331  
 
MOST PROBABLE PEAK WIND GUST...65-80 MPH  
MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN  
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