This alert expired on 3 September 2026 at 19:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 41 detections recorded within 20 km of this point since 4 April 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Tornado Warning issued September 3 at 3:15PM EDT until September 3 at 3:45PM EDT by NWS Detroit/Pontiac MI
An estimated 781,461 people live within 50 km of this point.
Nearby, since 4 April 2026
- May 18, 2026 · score 52 · 8.5 km
- September 3, 2026 · score 67 · 14.3 km
- September 3, 2026 · score 76 · 14.5 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 72 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Critical |
| Calamity Score (ours) | 72 / 100 |
| Our confidence | 90% |
| Coordinates | 42.5740, -83.8620 |
| Nearest City | Novi (33 km) |
| Population Exposed | 781.5K within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-09-03T19:15:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.b1ea9e818acbdfe14f35353d4cf2413d1c086181.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Livingston, MI |
| Headline | Tornado Warning issued September 3 at 3:15PM EDT until September 3 at 3:45PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-09-03T15:45:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 1 SE Lansing |
| Spc County | Ingham |
| Spc State | MI |
| Spc Comments | Healthy 6 inch diameter tree down on road. Time approximate. (GRR) |
| Iem TypeSummary | D |
| Iem City | 3 W Lake Orion |
| Iem County | Oakland |
| Iem State | MI |
| Iem Wfo | DTX |
| Iem Remark | One large healthy tree down. |
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 72/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.