Chicago, Illinois – Severe storms are expected to rapidly intensify across the Chicago metro area late this afternoon, with impacts beginning as early as 4 p.m. and threatening to disrupt the evening commute on major corridors including I-90, I-94, and I-290 through 10 p.m.
According to the National Weather Service Chicago office, northern Illinois is in a favorable zone for severe storm development, with the greatest threat arriving in two waves. The second round, expected late afternoon into the evening, may produce damaging wind gusts near 70 mph, large hail up to 2 inches, and a risk of brief tornadoes, especially near and south of I-80.
The highest impacts are expected across Chicago, Aurora, Joliet, Naperville, and northwest Indiana. Storms may begin as isolated cells west of Rockford before organizing into a fast-moving line pushing east toward Lake Michigan. Drivers should expect sudden visibility drops, standing water, and debris that could quickly clog lanes or force closures.
Wind damage may be widespread, with downed trees and power lines leading to scattered outages across Cook, DuPage, and Will counties. Hail could damage vehicles and roofs, particularly during early storm development before storms merge into a line.
Residents should secure outdoor items, charge devices, and prepare for rapid warnings. Avoid unnecessary travel during peak storm hours, especially between 5 p.m. and 9 p.m. when conditions may deteriorate quickly.
Storms will move fast, limiting reaction time. The severe threat continues through 10 p.m., and additional warnings may be issued as the system pushes east into northwest Indiana.
