Right now
The most recent data we hold from NOAA arrived 29 minutes 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 3 July 2026 at 02:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 69 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 30 June 2026. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 2 at 8:21PM CDT until July 2 at 9:00PM CDT by NWS Duluth MN
Urban PEI: 112,689 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- May 24, 2026 · score 43 · 12.5 km
- June 10, 2026 · score 43 · 20.3 km
- June 5, 2026 · score 43 · 23.4 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.78/1 |
| Coordinates | 46.9560, -91.5860 |
| Nearest City | Duluth (44 km) |
| Urban exposure index (PEI) | 112.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T01:21:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.4e75555ba05121e8ad5698fbd339791f2513902b.001.1 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-07-03T01:21:00.000Z.
First archived: 2026-07-03T01:59:10.135Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Silver Bay Harbor to Two Harbors MN; 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 July 2 at 8:21PM CDT until July 2 at 9:00PM CDT by NWS Duluth MN |
| Expires | 2026-07-02T21:00:00-05:00 |
| 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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