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 20 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued May 17 at 6:13PM 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
- June 11, 2026 · score 67 · 17.7 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 58 out of 100, at 89 % 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 | 89% |
| Coordinates | 43.6280, -83.2940 |
| Nearest City | Bay City (48 km) |
| Population Exposed | 33.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-17T22:13:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.c928f203d4b1ee4695908d6589179b1426ee4db1.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Huron, MI; Tuscola, MI |
| Headline | Tornado Warning issued May 17 at 6:13PM 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 |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | inch |
| Iem City | 2 SE Tri Cities Intl Ai |
| Iem County | Saginaw |
| Iem State | MI |
| Iem Wfo | DTX |
| Iem Remark | Quarter sized hail reported by trained spotter. Photo also relayed via social media. |
| MergedSources | [{"id":"iem_H_43.500_-84.090_1779051660000","source":"iem","severity":"low","severityValue":25,"timestamp":1779051660000,"latitude":43.5,"longitude":-84.09},{"id":"iem_H_43.510_-84.050_1779052080000","source":"iem","severity":"low","severityValue":25,"timestamp":1779052080000,"latitude":43.51,"longitude":-84.05}] |
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.
Want to know when something happens near Bay City?
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 187 scientific monitoring sources.