Right now
The most recent data we hold from NOAA arrived 1 minute 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 16 May 2026 at 09:00 UTC. It is kept here as a record.
It is the 5th strongest of the 14 detections recorded within 20 km of this point since 16 May 2026.
What the source measured
NOAA reported: Special Marine Warning issued May 16 at 3:31AM EDT until May 16 at 5:00AM EDT by NWS Grand Rapids MI
Nearby, since 16 May 2026
- June 11, 2026 · score 41 · 15.4 km
- June 16, 2026 · score 48 · 18.3 km
- June 10, 2026 · score 41 · 24.7 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 66 % 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 | 66% |
| Coordinates | 43.1840, -87.1829 |
| Nearest City | Cudahy (60 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-16T07:31:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.f2b8a87b02cf59b8c7598764824a6ac3 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | South Haven to Holland MI; Holland to Grand Haven MI; Grand Haven to Whitehall MI; 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; Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to Mid Lake; Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid Lake; Lake Michigan from South Haven to Holland MI 5NM offshore to Mid lake; Port Washington to North Point Light WI; North Point Light to Wind Point WI; Wind Point WI to Winthrop Harbor IL; Lake Michigan from Port Washington to North Point Light WI 5NM offshore to Mid Lake; Lake Michigan from North Point Light to Wind Point WI 5NM offshore to Mid Lake; Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued May 16 at 3:31AM EDT until May 16 at 5:00AM EDT by NWS Grand Rapids MI |
| Expires | 2026-05-16T05:00:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f2b8a87b02cf59b8c7598764824a6ac3bfd653ea.001.1","noaa_urn:oid:2.49.0.1.840.0.cdf22f189fcd24987cb93e058ea32334e0d0690e.001.1"] |
| Google News RssFeed | weather |
| Google News SourceName | FOX6 News Milwaukee |
| MergedSources | [{"id":"gnews_weather_494139_188","source":"google_news","severity":"medium","severityValue":40,"timestamp":1778902856000,"latitude":43.04,"longitude":-87.91}] |
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?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.