This alert expired on 11 August 2026 at 04:30 UTC. It is kept here as a record.
No stronger detection stands among the 40 recorded within 20 km of this point since 12 March 2026 — 13 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: Severe Thunderstorm Warning issued August 10 at 11:52PM EDT until August 11 at 12:30AM EDT by NWS Cleveland OH
An estimated 120,252 people live within 50 km of this point.
Nearby, since 12 March 2026
- March 16, 2026 · score 43 · 6.2 km
- August 8, 2026 · score 43 · 8.3 km
- August 10, 2026 · score 43 · 9.3 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 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 40.7181, -82.6572 |
| Nearest City | Mansfield (12 km) |
| Population Exposed | 120.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T03:52:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.5a5d4a674a8fe6e471da4099a16b4b12 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Erie, OH; Huron, OH; Sandusky, OH; Seneca, OH; Crawford, OH; Huron, OH; Richland, OH; Seneca, OH; Fulton, OH and 4 more areas |
| Headline | Severe Thunderstorm Warning issued August 10 at 11:52PM EDT until August 11 at 12:30AM EDT by NWS Cleveland OH |
| Expires | 2026-08-11T00:30:00-04:00 |
| SenderName | NWS Cleveland OH |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5a5d4a674a8fe6e471da4099a16b4b1280fbf903.001.1","noaa_urn:oid:2.49.0.1.840.0.e9d8a87d27419382c900eb176855e66f2eec0dcc.002.1","noaa_urn:oid:2.49.0.1.840.0.1bc3b9c712609feaa05c08314424a53cc9cf5a53.001.1","noaa_urn:oid:2.49.0.1.840.0.5d49b84c7f0237ed5e6285f46b8c9788a8528bcd.001.1","noaa_urn:oid:2.49.0.1.840.0.d799d5cd190e5e02ba93d74ab5f16b9aa467ac7f.002.1","noaa_urn:oid:2.49.0.1.840.0.36d856a8613e90579daa525fcd77e70091fe727f.002.1","noaa_urn:oid:2.49.0.1.840.0.901fc2c564a63ff22d6f4005b9bdf1f82fdb987a.002.1"] |
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 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.
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 188 scientific monitoring sources.