Severe Storms Threaten Chicago Area with Tornadoes, Hail, and Flooding

Two rounds of storms expected to bring dangerous conditions on Friday evening.

Apr. 17, 2026 at 11:18pm

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A dramatic, atmospheric landscape painting in the style of Caspar David Friedrich, depicting a stormy, ominous sky filled with dark, swirling clouds over a flat, desolate plain, conveying the overwhelming, sublime power of the impending weather.The approaching storm system promises to unleash its full fury on the Chicago region, dwarfing the landscape with its immense, awe-inspiring power.Rockford Today

The Chicago area is bracing for a severe weather outbreak on Friday evening, with two rounds of storms expected to bring the potential for tornadoes, large hail, and flash flooding. The first round of storms is forecast to arrive around 4 p.m., with the second, more significant round hitting around 8 p.m. and lasting until midnight. Thunderstorms could drop 1-3 inches of rain, increasing the risk of flash flooding on already saturated ground.

Why it matters

Severe storms of this magnitude pose a serious threat to public safety, with the potential for widespread damage to homes, businesses, and infrastructure. The Chicago area has a history of devastating tornado events, and residents must be prepared to take shelter when warnings are issued.

The details

The first round of storms is expected to bring the potential for tornado warnings in the northwest suburbs, with a tornado already reported in Lena, Illinois, about 47 miles west of Rockford, damaging both the high school and elementary school while students were inside. The second, more significant round of storms arriving around 8 p.m. will impact the entire Chicago area with straight-line winds ranging from 60 to up to 90 miles per hour, carrying the highest risk for tornadoes, particularly in the western suburbs between 8 p.m. and 10 p.m.

  • The first round of storms is expected to arrive by about 4 p.m.
  • A tornado has already been reported in Lena, Illinois, about 47 miles west of Rockford.
  • The second, more significant round of storms will arrive around 8 p.m. and last until midnight.
  • Thunderstorms could drop 1-3 inches of rain across the region, with some areas seeing as much as 3 inches.
  • A tornado watch and flood watch have been issued for the entire Chicago area until 11 p.m.

The players

Chicago Area

The metropolitan region surrounding the city of Chicago, including several counties in Illinois.

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What’s next

Residents should closely monitor weather forecasts and be prepared to take shelter if tornado warnings are issued for their area. Authorities are urging people to avoid unnecessary travel during the storm event.

The takeaway

This severe weather outbreak highlights the importance of emergency preparedness and the need for communities to have robust plans in place to protect residents and mitigate the impact of natural disasters. Residents should stay vigilant and heed all warnings from local officials.