This alert expired on 10 August 2026 at 12:15 UTC. It is kept here as a record.
No stronger detection stands among the 51 recorded within 20 km of this point since 26 March 2026 — 15 others scored the same. The last comparable one was on 2 August 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 10 at 6:39AM EDT until August 10 at 8:15AM EDT by NWS Cleveland OH
An estimated 368,764 people live within 50 km of this point.
Nearby, since 26 March 2026
- July 10, 2026 · score 43 · 4.3 km
- September 4, 2026 · score 37 · 5.5 km
- June 14, 2026 · score 43 · 7.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 87 % 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) | 43 / 100 |
| Our confidence | 87% |
| Coordinates | 41.6738, -83.0677 |
| Nearest City | Oregon (35 km) |
| Population Exposed | 368.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T10:39:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.feccb7f2dc9d04c6d01d67c0b7100972316d21b7.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Maumee Bay to Reno Beach OH; Reno Beach to The Islands OH; Detroit River Lt. to Maumee Bay OH to Reno Beach OH beyond 5NM offshoreline to US-Canadian border; Reno Beach to The Islands OH beyond 5NM off shoreline to US-Canadian border |
| Headline | Special Marine Warning issued August 10 at 6:39AM EDT until August 10 at 8:15AM EDT by NWS Cleveland OH |
| Expires | 2026-08-10T08:15:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 39 |
| Iem Unit | MPH |
| Iem City | 1 W Harbor View |
| Iem County | Lucas |
| Iem State | OH |
| Iem Wfo | CLE |
| Iem Remark | 34 knot wind gust. Buoy station THRO1 Toledo, OH. |
| MergedSources | [{"id":"iem_M_41.690_-83.470_1786358160000","source":"iem","severity":"low","severityValue":25,"timestamp":1786358160000,"latitude":41.69,"longitude":-83.47}] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.