This alert expired on 16 March 2026 at 08:00 UTC. It is kept here as a record.
No stronger detection stands among the 42 recorded within 20 km of this point since 12 March 2026 — 11 others scored the same. The last comparable one was on 12 March 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 16 at 3:15AM EDT until March 16 at 4:00AM EDT by NWS Cleveland OH
An estimated 120,252 people live within 50 km of this point.
Nearby, since 12 March 2026
- August 11, 2026 · score 43 · 2.6 km
- March 16, 2026 · score 43 · 4.0 km
- August 8, 2026 · score 43 · 5.7 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.
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 | 78% |
| Coordinates | 40.6976, -82.6434 |
| Nearest City | Mansfield (13 km) |
| Population Exposed | 120.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T07:15:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.724f47029b77865efb097c00dcfa99cd |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Knox, OH; Morrow, OH; Crawford, OH; Erie, OH; Huron, OH; Marion, OH; Morrow, OH; Richland, OH; Seneca, OH |
| Headline | Severe Thunderstorm Warning issued March 16 at 3:15AM EDT until March 16 at 4:00AM EDT by NWS Cleveland OH |
| Expires | 2026-03-16T04:00:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.724f47029b77865efb097c00dcfa99cdabec8a7e.001.1","noaa_urn:oid:2.49.0.1.840.0.35bcf1c941c2863016b2ec78dbbb51ae5bd99e8b.001.1"] |
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 near Mansfield?
Calamity.live data shows a weather event with CalamityScore 43/100, near Mansfield (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.