This alert expired on 12 June 2026 at 02:30 UTC. It is kept here as a record.
It is the strongest of the 25 detections recorded within 20 km of this point since 4 April 2026. The last comparable one was on 10 June 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued June 11 at 9:54PM EDT until June 11 at 10:30PM EDT by NWS Grand Rapids MI
An estimated 301,191 people live within 50 km of this point.
Nearby, since 4 April 2026
- June 10, 2026 · score 37 · 11.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 67 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Critical |
| Calamity Score (ours) | 67 / 100 |
| Our confidence | 80% |
| Coordinates | 42.7250, -84.9167 |
| Nearest City | Waverly (24 km) |
| Population Exposed | 301.2K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-06-12T01:54:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6fe4e7200af99c657f99c8c9773bc09e3084cda1.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clinton, MI; Eaton, MI; Ionia, MI |
| Headline | Tornado Warning issued June 11 at 9:54PM EDT until June 11 at 10:30PM EDT by NWS Grand Rapids MI |
| Expires | 2026-06-11T22:30:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
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 8 March 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.
Want to know when something happens near Waverly?
Calamity.live data shows a weather event with CalamityScore 67/100, near Waverly (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.