This alert expired on 10 June 2026 at 07:15 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 — 11 others scored the same. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 10 at 2:00AM EDT until June 10 at 3:15AM EDT by NWS Cleveland OH
An estimated 414,432 people live within 50 km of this point.
Nearby, since 26 March 2026
- June 14, 2026 · score 43 · 10.7 km
- July 7, 2026 · score 43 · 16.6 km
- July 6, 2026 · score 43 · 16.6 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 82 % 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 | 82% |
| Coordinates | 41.4310, -83.0760 |
| Nearest City | Fremont (10 km) |
| Population Exposed | 414.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-10T06:00:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.4e431fce82f60e5a08623b01e10baa476717acec.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Ottawa, OH; Sandusky, OH |
| Headline | Flash Flood Warning issued June 10 at 2:00AM EDT until June 10 at 3:15AM EDT by NWS Cleveland OH |
| Expires | 2026-06-10T03:15:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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 Fremont?
Calamity.live data shows a weather event with CalamityScore 43/100, near Fremont (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.