890 

ACUS11 KWNS 160226
SWOMCD
SPC MCD 160226
ILZ000-WIZ000-IAZ000-160400-

Mesoscale Discussion 0460
NWS Storm Prediction Center Norman OK
0926 PM CDT Wed Apr 15 2026

Areas affected...northern and western Illinois...into far southeast
Wisconsin

Concerning...Severe Thunderstorm Watch 125...

Valid 160226Z - 160400Z

The severe weather threat for Severe Thunderstorm Watch 125
continues.

SUMMARY...Isolated severe gusts and perhaps a tornado will remain
possible this evening.

DISCUSSION...Two cluster of storms remains ongoing across WW125.
Radar trends within the line and farther south show generally
weakening cores. The surface is cooling, but the environment remains
somewhat unstable and moderately sheared. The expectation is for
convection to slowly weaken through this evening. However,
intermittent re-intensification of individual cells within the
overall line is possible for the next couple of hours. This could
support isolated damaging gusts or a tornado or two. This appears
most likely with southern portions of the cluster where storms are
slightly more robust. Thus, the severe risk continues across WW125.

..Lyons.. 04/16/2026

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...LOT...ILX...MKX...LSX...DVN...

LAT...LON   40229115 41789028 42328900 43268742 43118703 42658711
            41848783 40268976 40078997 40009014 40229115

MOST PROBABLE PEAK TORNADO INTENSITY...85-115 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN