Right now
The most recent data we hold from NOAA arrived 73 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 29 June 2026 at 22:15 UTC. It is kept here as a record.
No stronger detection stands among the 6 recorded within 20 km of this point since 26 May 2026 — 5 others scored the same. The last comparable one was on 26 May 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
Nearby, since 26 May 2026
- May 26, 2026 · score 22 · 5.4 km
How we know
4 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 | 0.69/1 |
| Coordinates | 47.0117, -89.9318 |
| Nearest City | Thunder Bay (160 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/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.bce4b2472ee1a5c23bad2e58b7302b80 |
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: 2026-06-29T21:21:51.313Z. 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; Chequamegon Bay-Bayfield to Oak Point WI; Duluth MN to Port Wing WI; Port Wing to Sand Island WI; Sand Island to Bayfield WI; Oak Point to Saxon Harbor WI; Outer Apostle Islands Beyond 5 NM from Mainland; Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM; Saxon Harbor WI to Black River MI; Black River To Ontonagon 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 |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bce4b2472ee1a5c23bad2e58b7302b801f65a64c.001.1","noaa_urn:oid:2.49.0.1.840.0.93c6169ca7f9bd543f769afce7f87d78dd243967.001.1","noaa_urn:oid:2.49.0.1.840.0.99fd2967e999fa3a82c8d24529442239f1aa2e01.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 51 |
| Iem Unit | MPH |
| Iem City | 5 NE Cedar |
| Iem County | Iron |
| Iem State | WI |
| Iem Wfo | DLH |
| Iem Remark | Saxon Harbor SXHW3. |
| MergedSources | [{"id":"iem_R_47.040_-90.680_1782756360000","source":"iem","severity":"low","severityValue":25,"timestamp":1782756360000,"latitude":47.04,"longitude":-90.68},{"id":"iem_M_46.780_-90.790_1782764040000","source":"iem","severity":"low","severityValue":25,"timestamp":1782764040000,"latitude":46.78,"longitude":-90.79},{"id":"iem_M_46.560_-90.440_1782765600000","source":"iem","severity":"low","severityValue":25,"timestamp":1782765600000,"latitude":46.56,"longitude":-90.44}] |
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.
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