Right now
The most recent data we hold from NOAA arrived 3 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 02:15 UTC. It is kept here as a record.
No stronger detection stands among the 21 recorded within 20 km of this point since 15 March 2026 — 2 others scored the same. The last comparable one was on 10 June 2026.
What the source measured
NOAA reported: Special Marine Warning issued June 30 at 9:49PM EDT until June 30 at 10:15PM EDT by NWS Grand Rapids MI
Nearby, since 15 March 2026
- July 1, 2026 · score 22 · 0.9 km
- June 10, 2026 · score 16 · 18.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 59 % 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 | 59% |
| Coordinates | 44.0336, -86.5273 |
| Nearest City | Manitowoc (91 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-01T01:49:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.438046afa195794a79dde9da971dd24802430e62.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Pentwater to Manistee MI; Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid Lake |
| Headline | Special Marine Warning issued June 30 at 9:49PM EDT until June 30 at 10:15PM EDT by NWS Grand Rapids MI |
| Expires | 2026-06-30T22:15:00-04:00 |
| 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.
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