Severe Storm Outlook Narrative (AC)
Issued by NWS
Issued by NWS
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085 ACUS11 KWNS 110744 SWOMCD SPC MCD 110743 IAZ000-ILZ000-110915- Mesoscale Discussion 1640 NWS Storm Prediction Center Norman OK 0243 AM CDT Fri Jul 11 2025 Areas affected...east-central Iowa into parts of far northwestern Illinois Concerning...Severe Thunderstorm Watch 504... Valid 110743Z - 110915Z The severe weather threat for Severe Thunderstorm Watch 504 continues. SUMMARY...Some severe wind threat continues across eastern Iowa and parts of far northwestern Illinois. DISCUSSION...A bowing line of storms which has produced measured winds as high as 64 knots (at KDSM) continues east across east-central Iowa. This line of storms is not currently as strong as it was across central Iowa. However, recent satellite data shows recent cooling cloud ops associated with this convection and additional development along the front ahead of the line. This may result in some strengthening/rejuvenation of the line as it moves across far eastern Iowa and parts of far northwestern Illinois within an environment featuring 2000 J/kg MUCAPE. Damaging wind gusts will likely remain the primary threat from this activity. ..Bentley/Guyer.. 07/11/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DVN...DMX... LAT...LON 41959254 42019197 41929124 41729069 41639054 41429050 41259049 41139069 41129110 41169173 41229227 41279248 41959254 MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN