This alert expired on 18 June 2026 at 04:45 UTC. It is kept here as a record.
It is the strongest of the 23 detections recorded within 20 km of this point since 16 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: Tornado Warning issued June 18 at 12:30AM EDT until June 18 at 12:45AM EDT by NWS Cleveland OH
An estimated 226,608 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 6, 2026 · score 39 · 8.5 km
- July 4, 2026 · score 43 · 12.3 km
- March 16, 2026 · score 43 · 15.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 67 out of 100, at 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 67 / 100 |
| Our confidence | 79% |
| Coordinates | 41.0900, -82.4860 |
| Nearest City | Norwalk (20 km) |
| Population Exposed | 226.6K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-06-18T04:30:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.66c3c5fcb04e3d096d40ab2d24734e923e0a7b7c.002.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Ashland, OH; Huron, OH; Richland, OH |
| Headline | Tornado Warning issued June 18 at 12:30AM EDT until June 18 at 12:45AM EDT by NWS Cleveland OH |
| Expires | 2026-06-18T00:45:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
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 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.
Calamity.live data shows a weather event with CalamityScore 67/100, near Norwalk (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.