Right now
The most recent data we hold from NOAA arrived 1 minute ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 24 May 2026 at 22:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 36 detections recorded within 20 km of this point since 3 April 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 24 at 4:22PM CDT until May 24 at 5:00PM CDT by NWS Duluth MN
An estimated 112,689 people live within 50 km of this point.
Nearby, since 3 April 2026
- June 10, 2026 · score 43 · 9.3 km
- June 5, 2026 · score 43 · 16.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 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 | Medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 79% |
| Coordinates | 46.8457, -91.6143 |
| Nearest City | Duluth (38 km) |
| Population Exposed | 112.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-24T21:22:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.99b485fe9529820940f06d7b651c5ca6234d7ed9.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Two Harbors to Duluth MN; Duluth MN to Port Wing WI; Port Wing to Sand Island WI; Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM |
| Headline | Special Marine Warning issued May 24 at 4:22PM CDT until May 24 at 5:00PM CDT by NWS Duluth MN |
| Expires | 2026-05-24T17:00:00-05:00 |
| SenderName | NWS Duluth MN |
| HasExactCoords | true |
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.
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