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.
One other detection within 20 km in the last 24 hours, 20 km from here.
This alert expired on 29 June 2026 at 22:15 UTC. It is kept here as a record.
It is one of only 2 we have recorded within 20 km of this point since 29 June 2026.
What the source measured
NOAA reported: Special Marine Warning issued June 29 at 5:15PM EDT until June 29 at 6:15PM EDT by NWS Marquette MI
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.65/1 |
| Coordinates | 47.2612, -89.0738 |
| Nearest City | Thunder Bay (125 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-29T21:15:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.bce4b2472ee1a5c23bad2e58b7302b801f65a64c.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: 2026-06-29T21:15:00.000Z.
First archived: 2026-06-29T22:05:42.147Z. 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 | 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 |
| Headline | Special Marine Warning issued June 29 at 5:15PM EDT until June 29 at 6:15PM EDT by NWS Marquette MI |
| Expires | 2026-06-29T18:15:00-04:00 |
| SenderName | NWS Marquette MI |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | Ontonagon |
| Spc County | Ontonagon |
| Spc State | MI |
| Spc Comments | Numerous trees and branches down. (MQT) |
| MergedSources | [{"id":"spc_wind_46.87_-89.31_42","source":"spc","severity":"medium","severityValue":45,"timestamp":1782768360000,"latitude":46.87,"longitude":-89.31}] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?