This alert expired on 3 July 2026 at 04:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 25 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 18 June 2026.
What the source measured
NOAA reported: Special Marine Warning issued July 2 at 11:01PM EDT until July 3 at 12:15AM EDT by NWS Grand Rapids MI
An estimated 33,742 people live within 50 km of this point.
Nearby, since 10 March 2026
- May 18, 2026 · score 34 · 9.1 km
- March 11, 2026 · score 37 · 19.5 km
- March 10, 2026 · score 37 · 19.7 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 78 % 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 | 78% |
| Coordinates | 42.6673, -86.4591 |
| Nearest City | Holland (32 km) |
| Population Exposed | 33.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T03:01:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.d1199015489f19f84853595044e9540483fef4cb.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | South Haven to Holland MI; Holland to Grand Haven MI; 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 |
| Headline | Special Marine Warning issued July 2 at 11:01PM EDT until July 3 at 12:15AM EDT by NWS Grand Rapids MI |
| Expires | 2026-07-03T00:15:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
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 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.