Tornado Warning — Warned Area, IL — Apr 17, 2026
NWS LOT · ETN 15 · National Weather Service warning
Event Summary
The National Weather Service office LOT issued a tornado warning at 21:09 UTC on Apr 17, 2026. The warning was in effect for 66 minutes, ending at Apr 17, 2026 22:15 UTC. At the last radar check, the storm was located near 42.37, -89.58, moving east at about 38 mph.
Timeline
- Issued
- Last updated
- Ended
Counties Affected
Towns in the Path
Storm Reports
| Time | Location | County / State | EF | Remarks |
|---|---|---|---|---|
| 3 N Pecatonica | Winnebago, IL | UNK | Video shows possible brief tornado north of Pecatonica. No known damage. Relayed via social media. (LOT) | |
| 4 S Shirland | Winnebago, IL | UNK | An NWS damage survey confirmed than a high-end EF-1 tornado with peak winds of 110 mph... path length of 3.74 miles... and maximum width of 125 yards damaged trees and (LOT) | |
| 3 SSE Shirland | Winnebago, IL | UNK | Trained spotter reports tornado on the ground just southeast of Harrison. (LOT) | |
| 3 ESE Shirland | Winnebago, IL | UNK | Multiple photos and videos shared via social media show tornado on the ground between Harrison and Rockton. (LOT) | |
| 4 SE Janesville | Rock, WI | UNK | NWS Damage Survey concludes an EF-1 tornado occurred with estimated peak winds of 100 mph. The tornado started southwest of Emerald Grove and moved northeastward... tak (MKX) | |
| 4 SE Janesville | Rock, WI | UNK | Multiple reports of a tornado on the ground. (MKX) | |
| 5 ENE Avalon | Rock, WI | UNK | Snapped and uprooted trees... damage to houses... and sheet metal wrapped around trees near Emerald Grove. Time estimated from radar. (MKX) | |
| 1 N Avalon | Rock, WI | UNK | Corrects previous tornado report from 5 ENE Avalon. Snapped and uprooted trees... damage to houses... and sheet metal wrapped around trees near Emerald Grove. Time esti (MKX) | |
| 3 NNW Darien | Walworth, WI | UNK | NWS Storm Survey concludes an EF-1 tornado occurred with estimated peak winds of 100 mph. The tornado started just north of School Section Road... traveled along State (MKX) | |
| 3 WNW Delavan | Walworth, WI | UNK | NWS Damage Survey concludes an EF-1 tornado occurred with estimated peak winds of 100 mph. The tornado started near Turtle Creek by Klug Road... lifting northeastward t (MKX) | |
| 3 SE Shirland | Winnebago, IL | UNK | An NWS Damage survey confirmed an EF-1 tornado with peak winds of 95 mph... path length of 11.2 miles... and maximum width of 350 yards damaged trees and buildings incl (LOT) | |
| 2 ESE Roscoe | Winnebago, IL | UNK | Tornado on the ground visible from IL-173 and Belvidere Road looking north. Relayed by amateur radio. (LOT) |
Preliminary local storm reports (SPC) within the warned area window — subject to revision after NWS surveys.