This alert expired on 21 May 2026 at 01:01 UTC. It is kept here as a record.
It is the 4th strongest of the 43 detections recorded within 20 km of this point since 17 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 20 at 8:51PM EDT until May 20 at 9:00PM EDT by NWS Pittsburgh PA
Nearby, since 17 March 2026
- July 21, 2026 · score 16 · 4.1 km
- May 21, 2026 · score 22 · 6.2 km
- May 19, 2026 · score 22 · 9.1 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 66 % 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) | 22 / 100 |
| Our confidence | 66% |
| Coordinates | 39.1712, -79.4718 |
| Nearest City | Morgantown (66 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-21T00:51:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.bfabe681215af4f7fc1475e7fb15891010a49e74.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Preston, WV; Tucker, WV |
| Headline | Severe Thunderstorm Warning issued May 20 at 8:51PM EDT until May 20 at 9:00PM EDT by NWS Pittsburgh PA |
| Expires | 2026-05-20T21:01:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | 2 W Elkins |
| Iem County | Randolph |
| Iem State | WV |
| Iem Wfo | RLX |
| MergedSources | [{"id":"iem_G_38.930_-79.890_1779321840000","source":"iem","severity":"low","severityValue":25,"timestamp":1779321840000,"latitude":38.93,"longitude":-79.89}] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.