Severe Storm Outlook Narrative (AC)
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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