This alert expired on 12 August 2026 at 22:15 UTC. It is kept here as a record.
No stronger detection stands among the 28 recorded within 20 km of this point since 17 March 2026 — 10 others scored the same. Another comparable one was recorded here earlier the same day. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 12 at 6:05PM EDT until August 12 at 6:15PM EDT by NWS Cleveland OH
An estimated 117,846 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 26, 2026 · score 43 · 0.5 km
- June 12, 2026 · score 43 · 5.6 km
- June 11, 2026 · score 37 · 7.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 78 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 78% |
| Coordinates | 42.0171, -80.6643 |
| Nearest City | Ashtabula (19 km) |
| Population Exposed | 117.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-12T22:05:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.09dbb841855fb3864d0b689066c74abdf6d929b4.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Geneva-on-the-Lake to Conneaut OH; Geneva-on-the-Lake to Conneaut OH beyond 5 nm off shoreline to US-Canadian border |
| Headline | Special Marine Warning issued August 12 at 6:05PM EDT until August 12 at 6:15PM EDT by NWS Cleveland OH |
| Expires | 2026-08-12T18:15:00-04:00 |
| SenderName | NWS Cleveland OH |
| 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 10 February 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 43/100, near Ashtabula (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.