Right now
The most recent data we hold from NOAA arrived 9 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 13 May 2026 at 21:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 110 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 13 at 5:16PM EDT until May 13 at 5:45PM EDT by NWS Baltimore MD/Washington DC
An estimated 20,130 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 18, 2026 · score 34 · 6.1 km
- June 11, 2026 · score 28 · 7.2 km
- May 13, 2026 · score 34 · 11.2 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 34 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) | 34 / 100 |
| Our confidence | 90% |
| Coordinates | 39.4480, -79.2080 |
| Nearest City | Cumberland (44 km) |
| Population Exposed | 20.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-13T21:16:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.89a392fe00dbb19a73761f0f452741133bb8b887.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Allegany, MD; Garrett, MD; Mineral, WV |
| Headline | Severe Thunderstorm Warning issued May 13 at 5:16PM EDT until May 13 at 5:45PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-05-13T17:45:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 3 ESE Rivesville |
| Iem County | Marion |
| Iem State | WV |
| Iem Wfo | PBZ |
| Iem Remark | Tree down Catawba Road. |
| MergedSources | [{"id":"iem_D_39.590_-79.960_1778703480000","source":"iem","severity":"low","severityValue":25,"timestamp":1778703480000,"latitude":39.59,"longitude":-79.96},{"id":"iem_D_39.470_-80.000_1778703480000","source":"iem","severity":"low","severityValue":25,"timestamp":1778703480000,"latitude":39.47,"longitude":-80},{"id":"iem_H_39.590_-79.950_1778704740000","source":"iem","severity":"low","severityValue":25,"timestamp":1778704740000,"latitude":39.59,"longitude":-79.95},{"id":"iem_D_39.520_-80.070_1778702700000","source":"iem","severity":"low","severityValue":25,"timestamp":1778702700000,"latitude":39.52,"longitude":-80.07}] |
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.
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