This alert expired on 10 August 2026 at 14:03 UTC. It is kept here as a record.
It is the 12th strongest of the 27 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 10 at 9:54AM EDT until August 10 at 10:00AM EDT by NWS Cleveland OH
An estimated 38,147 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 2, 2026 · score 34 · 8.6 km
- June 26, 2026 · score 43 · 11.8 km
- August 12, 2026 · score 43 · 11.9 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 81 % 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 | 81% |
| Coordinates | 42.0056, -80.8072 |
| Nearest City | Ashtabula (15 km) |
| Population Exposed | 38.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T13:54:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.e3813f7a182ca7ec1ef757396f2364fe |
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; Willowick to Geneva-on-the Lake OH; Geneva-on-the-Lake to Conneaut OH; Conneaut OH to Ripley NY; Willowick to Geneva-on-the-Lake OH beyond 5NM off shoreline to US-Canadian border; Geneva-on-the-Lake to Conneaut OH beyond 5 nm off shoreline to US-Canadian border; Conneaut OH to Ripley NY beyond 5 nm off shoreline to US-Canadian border |
| Headline | Special Marine Warning issued August 10 at 9:54AM EDT until August 10 at 10:00AM EDT by NWS Cleveland OH |
| Expires | 2026-08-10T10:03:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e3813f7a182ca7ec1ef757396f2364fe18af590c.001.1","noaa_urn:oid:2.49.0.1.840.0.ada99f3bd2bd248ebaae6a231b6ca05ec6329499.001.1"] |
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 Ashtabula?
Calamity.live data shows a weather event with CalamityScore 34/100, near Ashtabula (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.