Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is in it.
3 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 21 September 2026 at 20:16 UTC. It is kept here as a record.
It is the 5th strongest of the 20 detections recorded within 20 km of this point since 1 April 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 21 at 4:07PM EDT until September 21 at 4:15PM EDT by NWS Charleston WV
Urban PEI: 18,156 within a heuristic 50 km radius; not unique people.
Nearby, since 1 April 2026
- August 11, 2026 · score 58 · 2.9 km
- July 28, 2026 · score 63 · 18.0 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 28 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 | Medium |
| Calamity Score (ours) | 28 / 100 |
| Legacy data-support index | 0.85/1 |
| Coordinates | 36.6052, -81.5433 |
| Nearest City | Boone (44 km) |
| Urban exposure index (PEI) | 18.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-21T20:07:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.d85f6986b96bc4a23b3b766533063ec061cfafdf.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: 2026-09-21T20:07:00.000Z.
First archived: 2026-09-21T20:14:04.665Z. 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 | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Buchanan, VA; McDowell, WV; Wyoming, WV; Buchanan, VA; Dickenson, VA; Burke, NC; McDowell, NC and 5 more areas |
| Headline | Severe Thunderstorm Warning issued September 21 at 4:07PM EDT until September 21 at 4:15PM EDT by NWS Charleston WV |
| Expires | 2026-09-21T16:16:00-04:00 |
| SenderName | NWS Charleston WV |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d85f6986b96bc4a23b3b766533063ec061cfafdf.001.1","noaa_urn:oid:2.49.0.1.840.0.3b7247ca4cc8d00a4289134829e10eb314b873e5.001.1","noaa_urn:oid:2.49.0.1.840.0.c65a4626ce2cff574c9ea2ef55af3eefc3e801c0.001.1","noaa_urn:oid:2.49.0.1.840.0.bf871424795dbd23d42cbd2ba9950c6c49452fc6.001.1","noaa_urn:oid:2.49.0.1.840.0.92f9d86c222d616bc71afa6f0e82eae5d08cc1b9.001.1","noaa_urn:oid:2.49.0.1.840.0.facab7c40fdc92b97e1154edae906b5f433ea187.001.1","noaa_urn:oid:2.49.0.1.840.0.34f42cb455850ab9ec904b1843319e324b5bee65.001.1","noaa_urn:oid:2.49.0.1.840.0.58dc741f5e0b1a0bd080340d607db1e6eb04d3b3.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 1 SW Galax Hillsville A |
| Spc County | Carroll |
| Spc State | VA |
| Spc Comments | Tree down on Coulson Church Road. (RNK) |
| MergedSources | [{"id":"spc_wind_36.75_-80.83_4","source":"spc","severity":"medium","severityValue":45,"timestamp":1790011860000,"latitude":36.75,"longitude":-80.83}] |
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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