Chicago, Illinois – Severe storms are expected to rapidly develop Monday afternoon, threatening major travel routes and power infrastructure across the middle Mississippi Valley, including Chicago, St. Louis, and Indianapolis.
According to the NOAA Storm Prediction Center, a widespread severe-weather event will unfold through Monday evening and overnight, with all hazards possible. Supercell storms are expected to form first, capable of producing EF2-strength tornadoes, very large hail exceeding 2 inches, and damaging wind gusts over 70 mph.
The highest risk stretches from eastern Missouri and Illinois into Indiana, Arkansas, and western Tennessee. Cities including St. Louis, Springfield, Peoria, Indianapolis, Memphis, and Little Rock sit within the core threat zone. Major corridors such as I-55, I-57, I-65, and I-40 could see sudden closures or dangerous driving conditions during peak storm timing between 4 p.m. and midnight.
Storms will move quickly northeast, increasing the risk of rapidly changing conditions. Power outages, downed trees, and debris on roadways are possible in areas hit by stronger cells. Heavy rainfall may also trigger localized flooding, especially in urban and low-lying areas.
Residents should finalize severe weather plans before 3 p.m. Monday, ensure multiple ways to receive warnings, and be ready to take shelter quickly if alerts are issued. This is a fast-moving setup, and warnings may be issued with little lead time.
