Tornado Outbreak Leaves Widespread Damage Across the Midwest, US

Tornado Outbreak Leaves Widespread Damage Across the Midwest, US

 In Event News

Severe weather over the weekend left a broad corridor of damage across the central US, as destructive winds and dozens of tornadoes impacted multiple states between Friday and early Saturday. The hardest-hit corridor was centered on parts of Minnesota, Wisconsin, and Illinois, with additional severe weather extending into Iowa and Missouri.

Illinois and Wisconsin experienced some of the most significant structural damage. According to the NWS in Green Bay, peak storm activity occurred between mid-afternoon and early evening on Saturday, producing multiple tornadoes across the region.

One of the strongest events was an EF3 tornado near Ringle in Marathon County, Wisconsin. Preliminary findings indicate peak winds of around 145 mph, with a path exceeding 13 miles and widths reaching up to roughly 600 yards. Damage assessments show that dozens of homes, estimated at around 75, were impacted, along with widespread tree loss and structural damage. Additional tornadoes, including several weaker EF1 events, were also confirmed across Wisconsin.

Further south, the NWS, Chicago has confirmed at least seven tornado tracks linked to the April 17 outbreak within its coverage area. These include paths near Harrison, Roscoe, Mendota, and parts of Livingston County, along with areas around Gibson City and Buckley.

Beyond tornado activity, the storm system produced heavy rainfall and flash flooding across already saturated regions. According to the NWS Chicago, rainfall totals across northern Illinois and southern Wisconsin reached 4 to 6 inches in several locations, contributing to rapid rises in rivers and localized flooding.

The Storm Prediction Center indicates that severe weather activity is expected to ease. Its latest outlook for April 20 does not highlight any areas at risk for severe thunderstorms.

Actionable Analytics on EigenPrism

Post-Event

Severe Thunderstorm Datasets

All EigenPrism users can assess the impact of these tornadoes that occurred on Apr 17 -19, 2026, using the following report template:

This report template consists of:

  1. The first page consists of 9 Damage survey footprints (EF2 & EF3 tornadoes) from Apr 17 – 19, 2026, from the NWS. These are all grouped on a single page. Other tornado damage survey footprints from NWS is available in EigenPrism’s model catalog.
  2. The second page consists of 24-hr Tornado Consolidated Reports from April 18, 2026, 11:59 GMT from NOAA.
  3. The rest of the pages of the report template consist of the 24-hr hail MESH swath footprint from NSSL as of Apr 17, Apr 18, & Apr 19, 2026.

Canopy Weather

Tornado

Subscribers of Canopy Weather in EigenPrism can assess the impact of the tornado using the following event footprints from April 17, 2026

Hail

Subscribers of Canopy Weather in EigenPrism can assess the impact of the Hail using the following event footprints from April 17, 2026

Wind

Subscribers of Canopy Weather in EigenPrism can assess the impact of the wind using the following event footprints from April 17, 2026

Alerts

Users who have alerts set on their exposures for the relevant event sets like those from NWS and Adiabat will receive alerts (if the event footprints impact these exposures).

To learn more about how to set an alert on a specific event set, check out  this help center article.

Feel free to contact us at Prism.Support@eigenrisk.com or reach out directly to your Customer Success Manager with any questions or concerns. Our team is here to assist you with setting alerts, understanding report templates, and maximizing the actionable insights available through EigenPrism®.

Not an EigenPrism User? Here’s a Quick Way to Check ZIP-Level Impact

For underwriters, brokers, and portfolio managers who need fast visibility into impacted ZIP codes, we’ve built a tool called ZIP Response on our website. It’s a free, no-login tool that highlights the top ZIP codes that are most impacted during active events, such as hurricanes, floods, wildfires, and severe storms.

You can request the complete ZIP list by simply filling out a short form and get it delivered straight to your inbox.

If you’d like to explore the impacted ZIP codes for this event, visit ZIP Response.
Or  Contact us, to have more info on this.

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