This alert expired on 2 September 2026 at 11:45 UTC. It is kept here as a record.
It is the 15th strongest of the 37 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 2 July 2026.
What the source measured
NOAA reported: Special Marine Warning issued September 2 at 6:58AM EDT until September 2 at 7:45AM EDT by NWS Gaylord MI
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100, at 61 % 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 | Medium |
| Calamity Score (ours) | 16 / 100 |
| Our confidence | 61% |
| Coordinates | 44.3781, -86.4314 |
| Nearest City | Traverse City (77 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-02T10:58:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.8e0b34ae6dc6f2ceb44a6f1c10a333b134792750.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Sleeping Bear Point to Grand Traverse Light MI; Point Betsie to Sleeping Bear Point MI; Manistee to Point Betsie MI; Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to mid lake; Lake Michigan from Point Betsie to Manistee MI 5NM offshore to Mid Lake; Pentwater to Manistee MI; Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued September 2 at 6:58AM EDT until September 2 at 7:45AM EDT by NWS Gaylord MI |
| Expires | 2026-09-02T07:45:00-04:00 |
| SenderName | NWS Gaylord MI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8e0b34ae6dc6f2ceb44a6f1c10a333b134792750.001.1","noaa_urn:oid:2.49.0.1.840.0.78f7b5d4ab65716184abdfb576959fead1c65783.001.1"] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
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 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.