This alert expired on 11 August 2026 at 06:45 UTC. It is kept here as a record.
No stronger detection stands among the 24 recorded within 20 km of this point since 16 March 2026 — 10 others scored the same. The last comparable one was on 10 August 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 11 at 1:59AM EDT until August 11 at 2:45AM EDT by NWS Cleveland OH
An estimated 1,217,213 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 25, 2026 · score 52 · 6.5 km
- July 5, 2026 · score 52 · 7.8 km
- June 11, 2026 · score 46 · 9.3 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 91 % 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) | 52 / 100 |
| Our confidence | 91% |
| Coordinates | 41.7775, -81.6362 |
| Nearest City | Eastlake (21 km) |
| Population Exposed | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T05:59:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.d9b642e3e183aec0f25a50493d9bd3c778573d3e.002.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Avon Point to Willowick OH; Willowick to Geneva-on-the Lake OH; Avon Point to Willowick OH beyond 5 nm off shoreline to US-Canadian border; Willowick to Geneva-on-the-Lake OH beyond 5NM off shoreline to US-Canadian border |
| Headline | Special Marine Warning issued August 11 at 1:59AM EDT until August 11 at 2:45AM EDT by NWS Cleveland OH |
| Expires | 2026-08-11T02:45:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 49 |
| Iem Unit | MPH |
| Iem City | 3 WNW Vermilion |
| Iem County | LEZ145 |
| Iem State | OH |
| Iem Wfo | CLE |
| Iem Remark | C-Man station VRMO1 2 WNW Vermilion gust to 43 knots. |
| MergedSources | [{"id":"iem_G_41.260_-81.880_1786424700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786424700000,"latitude":41.26,"longitude":-81.88},{"id":"iem_M_41.430_-82.360_1786424580000","source":"iem","severity":"low","severityValue":25,"timestamp":1786424580000,"latitude":41.43,"longitude":-82.36},{"id":"iem_M_41.430_-82.360_1786425000000","source":"iem","severity":"low","severityValue":25,"timestamp":1786425000000,"latitude":41.43,"longitude":-82.36}] |
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 Eastlake?
Calamity.live data shows a weather event with CalamityScore 52/100, near Eastlake (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.