Illinois tornado damage took a sharper shape on Friday night after the National Weather Service confirmed six tornadoes in McLean County, including three in Bloomington and Normal. The damage assessment is still unfolding, but the early picture is already notable: all six were relatively mild EF1 tornadoes or weaker, yet two reached winds of 110 mph. That mix of lower-rated storms with pockets of stronger wind underscores why survey teams are still working across a wide area rather than treating the event as finished.
What the storm surveys have confirmed so far
The National Weather Service said workers focused storm surveys on McLean County on Saturday, and the confirmation there was only part of a broader roundup. Three additional tornadoes were identified Friday night and Saturday morning in Stephenson and Winnebago counties in northern Illinois. The service also said additional tornadoes may still be confirmed later, a reminder that the final count can change as survey teams continue examining damage patterns.
The official tornado rating system ranges from EF0 to EF5, with EF5 being the strongest. In McLean County, the confirmed tornadoes remained on the lower end of that scale, but the wind readings still matter. Two tornadoes reached 110 mph, while the others peaked between 90 and 100 mph. In weather terms, that difference shapes how damage is understood, even when the tornadoes do not reach the highest categories.
Illinois tornado damage and the wider survey footprint
Friday night’s storms did not stop at one county line. The National Weather Service said additional survey teams were set to go out on Sunday to concentrate on Fulton, Tazewell and Mason counties, while another team would focus on Piatt, Champaign and Vermilion counties. More surveys could be needed on Monday as well. The scale of the investigation suggests that the full extent of Illinois tornado damage is still being documented, not fully settled.
That matters because storm surveys do more than tally tornadoes. They help distinguish where tornadoes touched down, how strong they were, and whether separate paths should be counted individually. In this case, the fact that the service identified more than one cluster of tornadoes across central and northern Illinois shows how widely Friday night’s severe weather spread.
Damage, outages, and why the count may still rise
The storms brought more than tornadoes. Severe weather also included damaging winds, large hail and localized flooding in the Chicago area, while power interruptions continued into Saturday morning. As of around 7 a. m. ET, more than 8, 300 ComEd customers in Northern Illinois and 8, 600 NIPSCO customers in Northern Indiana were affected by outages. Those figures point to a broader disruption footprint that went beyond the tornado corridors themselves.
Even so, the confirmed tornado count may not be the final word. The National Weather Service has already flagged the possibility of more confirmations as surveys continue. For communities trying to understand the aftermath, that means the official record of Illinois tornado damage is still in motion, with each new survey potentially refining where the storms struck and how severe they were.
What the official scale reveals about the event
On paper, the confirmed tornadoes in McLean County were not the most extreme type on the scale. But the numbers still matter because they show a night of multiple touchdowns rather than a single isolated storm. Three tornadoes in Bloomington and Normal, plus others across the county, indicate a concentrated event that left officials with a large area to examine. The service’s warning that more surveys may be needed on Monday reinforces that the assessment remains incomplete.
For now, the clearest takeaway is that Friday night’s weather produced a multi-county severe storm event with confirmed tornadoes in central and northern Illinois, ongoing outage impacts, and a survey process that is still adding to the map. The question now is how much more Illinois tornado damage will be confirmed once the remaining counties are fully checked.
