Right now
The most recent data we hold from NOAA arrived 79 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 04:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 11 detections recorded within 20 km of this point since 6 June 2026.
What the source measured
NOAA reported: Special Marine Warning issued June 5 at 10:52PM EDT until June 6 at 12:15AM EDT by NWS Grand Rapids MI
An estimated 81,807 people live within 50 km of this point.
Nearby, since 6 June 2026
- July 27, 2026 · score 34 · 11.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 32 out of 100, at 80 % 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) | 32 / 100 |
| Our confidence | 80% |
| Coordinates | 43.9138, -87.2112 |
| Nearest City | Manitowoc (41 km) |
| Population Exposed | 81.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-06T02:52:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.b11d6a8a6ee82a8c577dc651b70cd5c1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Whitehall to Pentwater MI; Pentwater to Manistee MI; Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid Lake; Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid Lake; Sheboygan to Port Washington WI; Lake Michigan from Sheboygan to Port Washington WI 5NM offshore to Mid Lake; Sturgeon Bay to Two Rivers WI; Two Rivers to Sheboygan WI; Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to Mid Lake; Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued June 5 at 10:52PM EDT until June 6 at 12:15AM EDT by NWS Grand Rapids MI |
| Expires | 2026-06-06T00:15:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b11d6a8a6ee82a8c577dc651b70cd5c18a9ef11c.001.1","noaa_urn:oid:2.49.0.1.840.0.d15f1c33495158bdaa002bd31b73fb2e68e76910.001.1","noaa_urn:oid:2.49.0.1.840.0.927eb79c6177731fd0d1c92bda1352dc61e2031f.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.
Want to know when something happens in this area?