UNITED STATES — Severe weather is possible across the Great Lakes region Monday, March 30, 2026, with a Marginal Risk (Level 1 of 5) in effect across a broad corridor stretching from Minnesota and Iowa through Illinois, Wisconsin, and Michigan. Cities including Chicago, Milwaukee, Detroit, Lansing, Green Bay, Marquette, and Duluth all fall within the risk zone today. Damaging winds and large hail are the primary threats — tornadoes are not expected to be a concern with this system.
What Is Driving Today’s Storm Threat
A weather system pushing across the Great Lakes region Monday is providing enough atmospheric lift and instability to support scattered severe thunderstorm development during the afternoon and evening hours.
The setup is not extreme — this is a Marginal Risk day, meaning severe weather will be isolated rather than widespread. Not every city in the risk zone will see storms, and many areas will stay completely dry. But those that do encounter a storm cell could see wind gusts strong enough to down trees and damage property, along with hail capable of denting vehicles and damaging crops.
Tornadoes are not anticipated with this setup. The wind shear profile across the Great Lakes Monday does not support significant rotation, keeping the tornado threat effectively off the table for today.
Cities in the Marginal Risk Zone Monday
City State Risk Level…