Right now
The most recent data we hold from NOAA arrived 83 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
33 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 21 September 2026 at 05:45 UTC. It is kept here as a record.
No stronger detection stands among the 110 recorded within 20 km of this point since 16 March 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day. 37 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued September 21 at 1:30AM EDT until September 21 at 1:45AM EDT by NWS Charleston WV
Nearby, since 16 March 2026
- September 21, 2026 · score 46 · 4.6 km
- September 2, 2026 · score 16 · 7.8 km
- August 8, 2026 · score 22 · 11.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Critical |
| Calamity Score (ours) | 46 / 100 |
| Legacy data-support index | 0.61/1 |
| Coordinates | 38.9350, -80.9600 |
| Nearest City | Parkersburg (64 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-21T05:30:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.976e3a125354ab0267c4ed1b9552b7417c3af322.001.1 |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-09-21T05:30:00.000Z.
First archived: 2026-09-21T05:36:36.138Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Calhoun, WV; Gilmer, WV |
| Headline | Tornado Warning issued September 21 at 1:30AM EDT until September 21 at 1:45AM EDT by NWS Charleston WV |
| Expires | 2026-09-21T01:45:00-04:00 |
| SenderName | NWS Charleston WV |
| HasExactCoords | true |
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.
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