Right now
The most recent data we hold from NOAA arrived 5 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 6 June 2026 at 07:30 UTC. It is kept here as a record.
It is the 7th strongest of the 42 detections recorded within 20 km of this point since 18 May 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 6 at 2:44AM EDT until June 6 at 3:30AM EDT by NWS Grand Rapids MI
An estimated 31,459 people live within 50 km of this point.
Nearby, since 18 May 2026
- June 8, 2026 · score 34 · 8.0 km
- August 10, 2026 · score 34 · 8.6 km
- September 5, 2026 · score 16 · 11.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 81 % 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) | 34 / 100 |
| Our confidence | 81% |
| Coordinates | 42.1563, -86.8946 |
| Nearest City | Michigan City (50 km) |
| Population Exposed | 31.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-06T06:44:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.f947a3ef5b1f535a0a32d3392ac83fd9 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | St Joseph to South Haven MI; Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake; Winthrop Harbor to Wilmette Harbor IL; Wilmette Harbor to Northerly Island IL; Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake; Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake; New Buffalo MI to St Joseph MI; Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to mid-line of lake. |
| Headline | Special Marine Warning issued June 6 at 2:44AM EDT until June 6 at 3:30AM EDT by NWS Grand Rapids MI |
| Expires | 2026-06-06T03:30:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f947a3ef5b1f535a0a32d3392ac83fd949dcef25.002.1","noaa_urn:oid:2.49.0.1.840.0.17194e73e0ab0c1f1a96206a2f1a640d9fa28ebb.001.1","noaa_urn:oid:2.49.0.1.840.0.87eec22b75323cc8f59ef6bf3a64c12f808953bc.001.1"] |
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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