This alert expired on 13 May 2026 at 21:18 UTC. It is kept here as a record.
It is the 3rd strongest of the 171 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 13 at 5:08PM EDT until May 13 at 5:15PM EDT by NWS Charleston WV
An estimated 34,885 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 4, 2026 · score 34 · 15.3 km
- July 22, 2026 · score 40 · 17.6 km
- September 4, 2026 · score 32 · 18.7 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 34 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 | Medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 89% |
| Coordinates | 39.1280, -80.4100 |
| Nearest City | Clarksburg (18 km) |
| Population Exposed | 34.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-13T21:08:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.3818a6265c885a4e24dec5b0837e3b86dc6622a2.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Barbour, WV; Harrison, WV; Lewis, WV; Upshur, WV |
| Headline | Severe Thunderstorm Warning issued May 13 at 5:08PM EDT until May 13 at 5:15PM EDT by NWS Charleston WV |
| Expires | 2026-05-13T17:18:00-04:00 |
| SenderName | NWS Charleston WV |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.7 |
| Iem Unit | Inch |
| Iem City | Sistersville |
| Iem County | Tyler |
| Iem State | WV |
| Iem Wfo | RLX |
| Iem Remark | Time is estimated by radar. |
| MergedSources | [{"id":"iem_H_38.800_-81.100_1778702280000","source":"iem","severity":"low","severityValue":25,"timestamp":1778702280000,"latitude":38.8,"longitude":-81.1},{"id":"iem_H_39.560_-81.000_1778698980000","source":"iem","severity":"low","severityValue":25,"timestamp":1778698980000,"latitude":39.56,"longitude":-81}] |
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 Clarksburg?
Calamity.live data shows a weather event with CalamityScore 34/100, near Clarksburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.