Right now
The most recent data we hold from NOAA arrived 15 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 02:00 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 30 June 2026 — 17 others scored the same. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 30 at 8:54PM EDT until June 30 at 10:00PM EDT by NWS Marquette MI
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 69 % 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) | 22 / 100 |
| Our confidence | 69% |
| Coordinates | 46.7210, -86.2940 |
| Nearest City | Marquette (87 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-01T00:54:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.307555831e9fc5d37f020d0885be8a19 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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; 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 |
| Headline | Special Marine Warning issued June 30 at 8:54PM EDT until June 30 at 10:00PM EDT by NWS Marquette MI |
| Expires | 2026-06-30T22:00:00-04:00 |
| SenderName | NWS Marquette MI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.307555831e9fc5d37f020d0885be8a1931879ddf.001.1","noaa_urn:oid:2.49.0.1.840.0.00784b53e9d0895cc6af381dd77b56b0094190fc.001.1"] |
| Iem TypeSummary | I |
| Iem Magnitude | 107 |
| Iem Unit | F |
| Iem City | 6 NNE Chicago Lake |
| Iem County | Delta |
| Iem State | MI |
| Iem Wfo | MQT |
| Iem Remark | Mesonet station HBRM4 High Bridge RAWS. |
| 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_46.130_-86.580_1782850980000","source":"iem","severity":"low","severityValue":25,"timestamp":1782850980000,"latitude":46.13,"longitude":-86.58}] |
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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