This alert expired on 10 August 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 106 recorded within 20 km of this point since 16 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 17 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued August 10 at 6:23PM EDT until August 10 at 7:00PM EDT by NWS Charleston WV
An estimated 25,044 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 18, 2026 · score 34 · 2.7 km
- August 7, 2026 · score 28 · 6.7 km
- May 24, 2026 · score 39 · 17.2 km
How we know
Confirmed by 8 independent sources, including NOAA.
Our own score for this event is 58 out of 100, at 89 % 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 | Critical |
| Calamity Score (ours) | 58 / 100 |
| Our confidence | 89% |
| Coordinates | 38.9442, -82.1692 |
| Nearest City | Athens (43 km) |
| Population Exposed | 25.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T22:23:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.d8a0f225705d1df0df4f2023c66bc4d3 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Gallia, OH; Mason, WV; Gallia, OH |
| Headline | Tornado Warning issued August 10 at 6:23PM EDT until August 10 at 7:00PM EDT by NWS Charleston WV |
| Expires | 2026-08-10T19:00:00-04:00 |
| SenderName | NWS Charleston WV |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d8a0f225705d1df0df4f2023c66bc4d362649eff.001.1","noaa_urn:oid:2.49.0.1.840.0.89a901fb9f04e99d4cfa1125aca569a55b8ef25c.002.1"] |
| Iem TypeSummary | D |
| Iem City | Nelsonville |
| Iem County | Athens |
| Iem State | OH |
| Iem Wfo | RLX |
| Iem Remark | Large tree with wires attached down on Grosvenor St. |
| MergedSources | [{"id":"iem_D_39.500_-82.230_1786381440000","source":"iem","severity":"low","severityValue":25,"timestamp":1786381440000,"latitude":39.5,"longitude":-82.23},{"id":"iem_D_39.250_-82.910_1786381200000","source":"iem","severity":"low","severityValue":25,"timestamp":1786381200000,"latitude":39.25,"longitude":-82.91},{"id":"iem_D_39.420_-82.600_1786380660000","source":"iem","severity":"low","severityValue":25,"timestamp":1786380660000,"latitude":39.42,"longitude":-82.6},{"id":"iem_D_39.260_-82.380_1786383120000","source":"iem","severity":"low","severityValue":25,"timestamp":1786383120000,"latitude":39.26,"longitude":-82.38},{"id":"iem_D_39.370_-82.160_1786380780000","source":"iem","severity":"low","severityValue":25,"timestamp":1786380780000,"latitude":39.37,"longitude":-82.16},{"id":"iem_D_39.340_-82.490_1786382400000","source":"iem","severity":"low","severityValue":25,"timestamp":1786382400000,"latitude":39.34,"longitude":-82.49},{"id":"iem_D_39.460_-82.220_1786380600000","source":"iem","severity":"low","severityValue":25,"timestamp":1786380600000,"latitude":39.46,"longitude":-82.22}] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 58/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.