This alert expired on 4 July 2026 at 00:45 UTC. It is kept here as a record.
It is one of only 4 we have recorded within 20 km of this point since 3 July 2026.
What the source measured
NOAA reported: Special Marine Warning issued July 3 at 7:20PM EDT until July 3 at 8:45PM EDT by NWS Cleveland OH
An estimated 98,660 people live within 50 km of this point.
Nearby, since 3 July 2026
- July 3, 2026 · score 43 · 17.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 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) | 39 / 100 |
| Our confidence | 78% |
| Coordinates | 42.0969, -82.3189 |
| Nearest City | Leamington (24 km) |
| Population Exposed | 98.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T23:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.2e4303a7dd612886a5996e6013694ede |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Vermilion to Avon Point OH; Avon Point to Willowick OH; Vermilion to Avon Point OH beyond 5 nm off shoreline to US-Canadian border; Avon Point to Willowick OH beyond 5 nm off shoreline to US-Canadian border; Reno Beach to The Islands OH; The Islands to Vermilion OH; Reno Beach to The Islands OH beyond 5NM off shoreline to US-Canadian border; The Islands to Vermilion OH beyond 5 nm off shoreline to US-Canadian border; St. Clair River; Harbor Beach to Port Sanilac MI; Port Sanilac to Port Huron MI; Lake Huron from Harbor Beach to Port Sanilac 5NM Off Shore to US/Canadian border; Lake Huron from Port Sanilac to Port Huron 5NM Off Shore to US/Canadian border |
| Headline | Special Marine Warning issued July 3 at 7:20PM EDT until July 3 at 8:45PM EDT by NWS Cleveland OH |
| Expires | 2026-07-03T20:45:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2e4303a7dd612886a5996e6013694eded55a0b42.001.1","noaa_urn:oid:2.49.0.1.840.0.7ff4c7553c80113e6a301059bf407bc102985dfd.001.1","noaa_urn:oid:2.49.0.1.840.0.4561b12f376749ee1625bf6aa5117a55185212a4.001.1"] |
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 near Leamington?
Calamity.live data shows a weather event with CalamityScore 39/100, near Leamington (Canada), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.