Right now
The most recent data we hold from NOAA arrived 9 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 1 July 2026 at 01:00 UTC. It is kept here as a record.
It is the 4th strongest of the 35 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 30 at 7:55PM EDT until June 30 at 9:00PM EDT by NWS Marquette MI
How we know
3 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 | 46.5599, -86.6177 |
| Nearest City | Marquette (60 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Date | 2026-06-30 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.26241ad5843ed2e6ad7385cb2dcee5b7 |
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: 2026-06-30 — time not reported.
First archived: 2026-06-30T23:56:13.881Z. 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 | Marquette to Munising MI; Munising to Grand Marais MI; Grand Marais to Whitefish Point MI; Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore; Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border; Marquette to Munising MI; Munising to Grand Marais MI; Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore |
| Headline | Special Marine Warning issued June 30 at 7:55PM EDT until June 30 at 9:00PM EDT by NWS Marquette MI |
| Expires | 2026-06-30T21:00:00-04:00 |
| SenderName | NWS Marquette MI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.26241ad5843ed2e6ad7385cb2dcee5b78262e038.001.1","noaa_urn:oid:2.49.0.1.840.0.c1df62f357311a6aa4bb83db8d1c4ac8926c9085.001.1"] |
| Iem TypeSummary | I |
| Iem Magnitude | 105 |
| Iem Unit | F |
| Iem City | Munising |
| Iem County | Alger |
| Iem State | MI |
| Iem Wfo | MQT |
| Iem Remark | ASOS station KP53 Munising Lakeshore. |
| MergedSources | [{"id":"iem_I_46.240_-85.940_1782846180000","source":"iem","severity":"low","severityValue":25,"timestamp":1782846180000,"latitude":46.24,"longitude":-85.94},{"id":"iem_I_46.410_-86.650_1782842160000","source":"iem","severity":"low","severityValue":25,"timestamp":1782842160000,"latitude":46.41,"longitude":-86.65}] |
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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