Wisconsin hail map — April 17, 2026
NOAA radar detected hail of an inch or more over 2 Wisconsin cities on April 17, 2026. The largest stones — 1.50″, half dollar size — fell over Janesville.
- Cities hit
- 2
- in Wisconsin
- Largest stone
- 1.50″
- half dollar size
- Impact rating
- 5/10
- from stone size
Sizes come from NOAA MRMS radar (MESH), which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.
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Wisconsin cities hit on April 17, 2026
What people on the ground measured in Wisconsin on April 17, 2026
12 reports filed with the National Weather Service — 5 from trained spotters or officials. These are measured stones, not radar estimates, so they are the closest thing to proof that hail actually reached the ground.
- 2.75″ baseball size Broadcast MediaMonroe, WI5:30 PM CDTGreen County
Relayed from Broadcast Media (WISC).
- 2.00″ hen egg size Trained Spotter3 E Beloit, WI5:29 PM CDTRock County
- 1.75″ golf ball size Broadcast MediaBeloit, WI5:16 PM CDTRock County
Relayed from Broadcast Media (WMTV Madison). Time estimated from radar.
- 1.75″ golf ball size PublicMilton, WI6:23 PM CDTRock County
- 1.50″ half dollar size Public1 S Monroe, WI5:20 PM CDTGreen County
- 1.50″ half dollar size Public1 WSW Janesville, WI6:12 PM CDTRock County
Time estimated from radar.
- 1.25″ half dollar size Trained Spotter4 NNW Bay City, WI2:47 PM CDTPierce County
Emailed photos of large hail in backyard. Time estimated via radar.
- 1.25″ half dollar size Trained Spotter4 NNE Stone Lake, WI5:01 PM CDTSawyer County
Largest hail was half-dollar size with lots of smaller hail.
- 1.25″ half dollar size Public1 N Monroe, WI5:11 PM CDTGreen County
Report from mPING: Half Dollar (1.25 in.).
- 1.25″ half dollar size Public1 NNW Hazelhurst, WI5:35 PM CDTOneida County
Delayed report from social media, time estimated by radar.
- 1.00″ quarter size Trained Spotter2 E Ellsworth, WI2:14 PM CDTPierce County
- 1.00″ quarter size Trained Spotter8 NW Thorp, WI2:45 PM CDTTaylor County
Showing the 12 largest of 53 hail reports filed that day.
Reports come from the National Weather Service Local Storm Report feed, ingested every 15 minutes. A report records where the observer was, not the full extent of the swath — treat it as evidence about the storm, not about any one roof.
Other Wisconsin hail days
Wisconsin hail on April 17, 2026
NOAA radar put hail of an inch or more over 2 Wisconsin cities that day. The largest stones — 1.50 inches, half dollar size — were over Janesville. Every city hit is listed above with its own stone size.