This alert expired on 16 March 2026 at 08:15 UTC. It is kept here as a record.
It is the 15th strongest of the 126 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 15 March 2026. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Storm Warning issued March 15 at 4:10PM EDT until March 16 at 2:00PM EDT by NWS Marquette MI
Nearby, since 10 March 2026
- August 9, 2026 · score 22 · 0.0 km
- August 8, 2026 · score 22 · 0.0 km
- August 7, 2026 · score 22 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 57 % 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 | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 57% |
| Coordinates | 44.3000, -85.6000 |
| Nearest City | Traverse City (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-16T00:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Storm Warning_noaa_urn:oid:2.49.0.1.840.0.6e2b3d474377a7ad6feb1fc5b1c64390 |
Score Breakdown
Technical Details
| Event | Storm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Saxon Harbor WI to Black River MI; Black River To Ontonagon MI; Ontonagon to Upper Entrance of Portage Canal MI; Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park; Seul Choix Point to Point Detour MI; 5NM East of a line from Fairport MI to Rock Island Passage; Upper Entrance of Portage Canal to Eagle River MI; Eagle River to Manitou Island MI; Manitou Island to Point Isabelle MI; Point Isabelle to Lower Entrance of Portage Canal MI; Portage Lake to Huron Island MI to Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays; Huron Islands to Marquette MI; Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border; Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore and 2 more areas |
| Headline | Storm Warning issued March 15 at 4:10PM EDT until March 16 at 2:00PM EDT by NWS Marquette MI |
| Expires | 2026-03-16T04:15:00-04:00 |
| SenderName | NWS Marquette MI |
| HasExactCoords | false |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6e2b3d474377a7ad6feb1fc5b1c64390b0684af2.002.3","noaa_urn:oid:2.49.0.1.840.0.6e2b3d474377a7ad6feb1fc5b1c64390b0684af2.005.2","noaa_urn:oid:2.49.0.1.840.0.6e2b3d474377a7ad6feb1fc5b1c64390b0684af2.003.3","noaa_urn:oid:2.49.0.1.840.0.6e2b3d474377a7ad6feb1fc5b1c64390b0684af2.004.2","noaa_urn:oid:2.49.0.1.840.0.1308669c4de945078abf5bd63597fa19853aa0cd.001.2"] |
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.