Illinois Experiences Record Tornado Count Amid Unusual Weather Patterns

This year, Illinois has faced an unprecedented number of tornadoes. Experts have reported at least 147 tornadoes so far, surpassing the previous highest count of 142 set in 2024. The state typically averages about 54 tornadoes annually. However, by mid-2026, Illinois has broken its own record.

In contrast, even during the busy tornado year of 2024, Illinois had experienced only 91 tornadoes by June 22, according to NOAA. The recent severe weather has placed Illinois well above traditional Tornado Alley states like Iowa, Kansas, and Texas in tornado frequency.

Recently, the state was hit by severe thunderstorms and heavy rain, with localized flooding threats near I-88. Meteorologists anticipate calmer weather at the week’s start but warn of dangerous currents and high waves on Lake Michigan.

The state’s National Weather Service has been actively monitoring and issuing warnings. A tornado watch was in effect for east central and southeast Illinois recently, with warnings in Shelby and Effingham counties. Radar confirmed tornado activity in these areas, causing significant damage.

It’s a step change. It’s not even a trend, said Trent Ford, the Illinois State Climatologist.

In recent surveys, the weather service confirmed multiple tornadoes across Illinois. Notable incidents included an EF-3 in Effingham and several EF-1 tornadoes in Springfield and Blue Mound. A recent EF-0 tornado also struck near Grayslake. EF-3 tornadoes, with speeds up to 165 mph, caused extensive damage, including house destruction and snapped tree trunks.

The rise in tornado numbers has puzzled experts. Iowa has also seen a significant increase, though its current count is around 65. Reasons for Illinois’s spike remain unclear. While climate change is a factor, it doesn’t fully explain the pattern.

Climate change leads to more humid air, aiding thunderstorms that can spawn tornadoes. Studies show tornadoes are increasingly common in nontraditional months as seasons change. Yet, this doesn’t fully account for Illinois’s recent surge.

Weather patterns like La Niña, contributing to active spring storms, are partly responsible. Predictions show El Niño’s arrival might alter next year’s weather patterns. These climate phenomena impact global jet streams and weather variations.