This alert expired on 17 May 2026 at 22:45 UTC. It is kept here as a record.
It is the 2nd strongest of the 24 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued May 17 at 6:07PM EDT until May 17 at 6:45PM EDT by NWS Detroit/Pontiac MI
An estimated 33,917 people live within 50 km of this point.
Nearby, since 15 March 2026
- May 17, 2026 · score 58 · 1.5 km
- June 11, 2026 · score 67 · 16.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 58 out of 100, at 79 % 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) | 58 / 100 |
| Our confidence | 79% |
| Coordinates | 43.6240, -83.3120 |
| Nearest City | Bay City (47 km) |
| Population Exposed | 33.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-17T22:07:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.e4b82c3252da6111f504829e94a0e605d6ada986.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Huron, MI; Tuscola, MI |
| Headline | Tornado Warning issued May 17 at 6:07PM EDT until May 17 at 6:45PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-05-17T18:45:00-04:00 |
| SenderName | NWS Detroit/Pontiac 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 in this area?
Calamity.live data shows a weather event with CalamityScore 58/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.