Summary (tl;dr)

Multiple radar-confirmed tornadoes, including at least one EF-2, struck Chicago's south suburbs and parts of Northwest Indiana on Tuesday, August 11, 2026, causing significant damage, widespread power outages, and prompting numerous tornado warnings across the region.

Essential Background

The Chicago metropolitan area has experienced an unusually active severe weather season in 2026, with the current tornado count well exceeding the 30-year average of 16. This recent activity includes two EF-1 tornadoes that touched down in LaSalle County, Illinois, on Sunday, August 10, derailing freight train cars and damaging farms. Additionally, seven tornadoes, including EF-1 and EF-0 strengths, impacted Chicago's suburbs and Northwest Indiana on Monday, July 27, causing damage in several communities.

The Full Story

On Tuesday, August 11, 2026, a dangerous line of thunderstorms swept through the Chicago metropolitan area and Northwest Indiana, spawning multiple radar-confirmed tornadoes. At least one large tornado, believed to be an EF-2 or greater, blasted through south suburban communities such as Flossmoor, Homewood, Thornton, and Glenwood in Illinois, before moving into Northwest Indiana. This tornado was described as rain-wrapped, making it difficult to see. Another radar-confirmed tornado was reported in Crown Point, Indiana, and a potential tornado was forming over University Park, Illinois.

The severe storms brought destructive winds, with gusts peaking at up to 115-120 mph in some areas, causing widespread tree damage, blocking roads, and downing power lines. Consequently, nearly 300,000 customers in Northern Illinois and Northwest Indiana experienced power outages. Tornado warnings were in effect for several Illinois counties, including Cook, DuPage, Will, Kane, Kendall, and Lake, as well as Lake, Newton, Jasper, and Porter counties in Indiana. Tornado sirens were activated in various locations, including Aurora and Plainfield. Authorities advised residents to seek immediate shelter, emphasizing that heavy rainfall could obscure tornadoes.

Why It Matters

The surge in searches for "chicago tornado" reflects significant public concern and the immediate impact of the severe weather event. Residents are seeking real-time information on tornado warnings, radar, and local weather conditions to ensure safety and assess damage. The widespread power outages and property damage highlight the disruptive and dangerous nature of these storms, particularly following a summer already marked by frequent severe weather and numerous tornado touchdowns in the region. The repeated occurrence of tornadoes, especially those of significant strength, raises concerns about the ongoing threat of extreme weather to homes, infrastructure, and public safety in the Chicago area and surrounding regions.

Geographic Location

• Flossmoor, Cook County, Illinois, United States (affected by EF-2+ tornado)
• Homewood, Cook County, Illinois, United States (affected by EF-2+ tornado, tree and property damage)
• Thornton, Cook County, Illinois, United States (affected by EF-2+ tornado)
• Glenwood, Cook County, Illinois, United States (affected by EF-2+ tornado)
• Lansing, Cook County, Illinois, United States (tornado damage, trees on homes and cars, blocked roads, power outages)
• University Park, Will County, Illinois, United States (potential tornado formation)
• Plainfield, Will County, Illinois, United States (high wind gusts during tornado warning)
• Crown Point, Lake County, Indiana, United States (radar-confirmed tornado)
• Ransom, LaSalle County, Illinois, United States (EF-1 tornado on August 10, train derailed, farms damaged)
• Streator, LaSalle County, Illinois, United States (EF-1 tornado on August 10, farms damaged)
• Country Club Hills, Cook County, Illinois, United States (EF-1 tornado on July 27)
• Hazel Crest, Cook County, Illinois, United States (EF-1 tornado on July 27)
• Harvey, Cook County, Illinois, United States (EF-1 tornado on July 27)
• Munster, Lake County, Indiana, United States (EF-1 tornado on July 27)