697  
ACUS11 KWNS 290554  
SWOMCD  
SPC MCD 290553  
WIZ000-ILZ000-IAZ000-MNZ000-290730-  
 
MESOSCALE DISCUSSION 1831  
NWS STORM PREDICTION CENTER NORMAN OK  
1253 AM CDT TUE JUL 29 2025  
 
AREAS AFFECTED...EASTERN IA...NORTHWEST IL...SOUTHWEST WI  
 
CONCERNING...SEVERE THUNDERSTORM WATCH 555...  
 
VALID 290553Z - 290730Z  
 
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 555  
CONTINUES.  
 
SUMMARY...STRONG TO ISOLATED SEVERE GUSTS SHOULD DIMINISH IN THE  
NEXT COUPLE HOURS AS AN MCS FROM NORTHEAST TO CENTRAL IOWA SPREADS  
EAST. AN ADDITIONAL WW APPEARS UNLIKELY.  
 
DISCUSSION...DEEP CONVECTIVE CORES WITHIN THE MCS ACROSS THE UPPER  
MIDWEST HAVE NOW BECOME CONFINED FROM NORTHEAST TO CENTRAL IOWA.  
NORTHERN PARTS OF THIS SHORT-LINE SEGMENT TRAIL BEHIND OUTFLOW FROM  
LEADING CONVECTION IN SOUTHWEST/CENTRAL WI. STILL, THIS MCS IS  
CROSSING THE MLCAPE GRADIENT, MODULATED BY LAST NIGHT'S MCS IN THE  
SAME REGION. IT IS PLAUSIBLE THAT ANOTHER SWATH OF SEVERE GUSTS MAY  
YET OCCUR WITH A SMALL-SCALE BOW/SURGE ACROSS NORTHEAST IA TOWARDS  
THE WI/IL BORDER AREA. BUT OVERALL TRENDS AND RECENT CAM GUIDANCE  
SUGGEST THE WIND THREAT WILL DIMINISH IN THE NEXT COUPLE HOURS.  
 
..GRAMS/HART.. 07/29/2025  
   
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT  
 
ATTN...WFO...LOT...MKX...DVN...ARX...DMX...  
 
LAT...LON 43419235 43519168 43559018 43348970 42528933 42098941  
41998945 41748979 41639039 41639117 41689186 41779256  
42009323 42189343 43419235  
 
MOST PROBABLE PEAK WIND GUST...55-70 MPH  
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