This alert expired on 3 September 2026 at 22:45 UTC. It is kept here as a record.
It is the strongest of the 51 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Tornado Warning issued September 3 at 6:15PM EDT until September 3 at 6:45PM EDT by NWS Cleveland OH
An estimated 1,197,443 people live within 50 km of this point.
Nearby, since 17 March 2026
- September 3, 2026 · score 9 · 7.0 km
- September 3, 2026 · score 76 · 7.2 km
- August 10, 2026 · score 48 · 10.7 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 76 out of 100, at 86 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Critical |
| Calamity Score (ours) | 76 / 100 |
| Our confidence | 86% |
| Coordinates | 41.5014, -81.1771 |
| Nearest City | Mentor (23 km) |
| Population Exposed | 1.2M within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-09-03T22:15:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.23ab7b2e969e9028b07d16a8728df227dea1c13a.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cuyahoga, OH; Geauga, OH; Lake, OH |
| Headline | Tornado Warning issued September 3 at 6:15PM EDT until September 3 at 6:45PM EDT by NWS Cleveland OH |
| Expires | 2026-09-03T18:45:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| Iem TypeSummary | C |
| Iem City | 1 NW Willoughby Hills |
| Iem County | Lake |
| Iem State | OH |
| Iem Wfo | CLE |
| Iem Remark | Funnel cloud reported by trained spotter. |
| MergedSources | [{"id":"iem_C_41.590_-81.450_1788473040000","source":"iem","severity":"low","severityValue":25,"timestamp":1788473040000,"latitude":41.59,"longitude":-81.45}] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 Mentor?
Calamity.live data shows a weather event with CalamityScore 76/100, near Mentor (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.