This alert expired on 27 May 2026 at 20:05 UTC. It is kept here as a record.
It is the 9th strongest of the 95 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 12 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 27 at 3:55PM EDT until May 27 at 4:00PM EDT by NWS Pittsburgh PA
An estimated 65,593 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 20, 2026 · score 39 · 9.1 km
- July 21, 2026 · score 63 · 11.0 km
- August 7, 2026 · score 39 · 11.9 km
How we know
Confirmed by 9 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 90 % 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) | 39 / 100 |
| Our confidence | 90% |
| Coordinates | 39.4783, -80.4682 |
| Nearest City | Clarksburg (25 km) |
| Population Exposed | 65.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-27T19:55:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.5c2dbe316209dc9d88a15f12a5bee253 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Marion, WV; Doddridge, WV; Harrison, WV |
| Headline | Severe Thunderstorm Warning issued May 27 at 3:55PM EDT until May 27 at 4:00PM EDT by NWS Pittsburgh PA |
| Expires | 2026-05-27T16:05:00-04:00 |
| SenderName | NWS Pittsburgh PA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5c2dbe316209dc9d88a15f12a5bee253ce8324bf.001.1","noaa_urn:oid:2.49.0.1.840.0.9632922d945a38d282e173490982a6fb53c38573.001.1"] |
| Iem TypeSummary | F |
| Iem City | 2 NE Montrose |
| Iem County | Randolph |
| Iem State | WV |
| Iem Wfo | RLX |
| Iem Remark | Parsons Road is closed in spots due to high water issues. |
| MergedSources | [{"id":"iem_F_39.120_-80.040_1779895500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779895500000,"latitude":39.12,"longitude":-80.04},{"id":"iem_F_38.960_-80.810_1779895800000","source":"iem","severity":"low","severityValue":25,"timestamp":1779895800000,"latitude":38.96,"longitude":-80.81},{"id":"iem_F_39.100_-80.470_1779891420000","source":"iem","severity":"low","severityValue":25,"timestamp":1779891420000,"latitude":39.1,"longitude":-80.47},{"id":"iem_F_39.030_-80.780_1779892440000","source":"iem","severity":"low","severityValue":25,"timestamp":1779892440000,"latitude":39.03,"longitude":-80.78},{"id":"iem_F_39.150_-80.050_1779892380000","source":"iem","severity":"low","severityValue":25,"timestamp":1779892380000,"latitude":39.15,"longitude":-80.05},{"id":"iem_F_39.090_-80.100_1779892440000","source":"iem","severity":"low","severityValue":25,"timestamp":1779892440000,"latitude":39.09,"longitude":-80.1},{"id":"iem_F_39.010_-80.930_1779892500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779892500000,"latitude":39.01,"longitude":-80.93},{"id":"iem_F_39.090_-79.790_1779895140000","source":"iem","severity":"low","severityValue":25,"timestamp":1779895140000,"latitude":39.09,"longitude":-79.79}] |
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 39/100, near Clarksburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.