This alert expired on 11 March 2026 at 00:30 UTC. It is kept here as a record.
It is the 3rd strongest of the 52 detections recorded within 20 km of this point since 10 March 2026.
What the source measured
NOAA reported: Tornado Warning issued March 10 at 6:55PM CDT until March 10 at 7:30PM CDT by NWS Chicago IL
An estimated 18,342 people live within 50 km of this point.
Nearby, since 10 March 2026
- August 10, 2026 · score 63 · 2.4 km
- March 11, 2026 · score 63 · 3.6 km
- June 25, 2026 · score 39 · 10.5 km
How we know
Confirmed by 49 independent sources, including NOAA.
Our own score for this event is 58 out of 100, at 87 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 58 / 100 |
| Our confidence | 87% |
| Coordinates | 41.1940, -88.6256 |
| Nearest City | Ottawa (25 km) |
| Population Exposed | 18.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-10T23:55:00.000Z |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Kankakee, IL; Lake, IN; Newton, IN; Bureau, IL; Henry, IL |
| Headline | Tornado Warning issued March 10 at 6:55PM CDT until March 10 at 7:30PM CDT by NWS Chicago IL |
| Expires | 2026-03-10T19:30:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e2c5cf852158b467eedc7abdf535c798838fd074.001.1","noaa_urn:oid:2.49.0.1.840.0.16018ea0325982520ec67d446b5e4f438c5c5c97.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 300 |
| Spc Location | Kankakee |
| Spc County | Kankakee |
| Spc State | IL |
| Spc Comments | 3 inch diameter hail reported in Kankakee. Relayed via amateur radio. (LOT) |
| Iem TypeSummary | D |
| Iem City | 1 N Pontiac |
| Iem County | Livingston |
| Iem State | IL |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 58/100, near Ottawa (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.