This alert expired on 22 July 2026 at 01:30 UTC. It is kept here as a record.
No stronger detection stands among the 45 recorded within 20 km of this point since 11 March 2026 — 13 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 21 at 8:19PM CDT until July 21 at 8:30PM CDT by NWS Nashville TN
An estimated 1,067,660 people live within 50 km of this point.
Nearby, since 11 March 2026
- March 12, 2026 · score 52 · 4.5 km
- March 12, 2026 · score 52 · 7.8 km
- March 11, 2026 · score 52 · 7.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 80% |
| Coordinates | 36.3507, -86.6315 |
| Nearest City | Hendersonville (6 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-22T01:19:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.34c86817d35911a17fa7073eadd8f7b8 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Robertson, TN; Sumner, TN; Jackson, TN; Macon, TN; Putnam, TN; Smith, TN; Trousdale, TN; Davidson, TN; Rutherford, TN; Williamson, TN; Wilson, TN and 3 more areas |
| Headline | Severe Thunderstorm Warning issued July 21 at 8:19PM CDT until July 21 at 8:30PM CDT by NWS Nashville TN |
| Expires | 2026-07-21T20:30:00-05:00 |
| SenderName | NWS Nashville TN |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.34c86817d35911a17fa7073eadd8f7b8541bb1c4.001.1","noaa_urn:oid:2.49.0.1.840.0.65d3d1838b8b0d71ae2f98de04b93f5f1ad0bd80.001.1","noaa_urn:oid:2.49.0.1.840.0.9375f7a181130291aa746b758df74b0ba17e88ae.001.1","noaa_urn:oid:2.49.0.1.840.0.4474d44f9a3f1d404f1e68c9caf90b1b0d11c5d4.001.1","noaa_urn:oid:2.49.0.1.840.0.57eaa94f2e13ba79854a27bb2898bb97dee75191.001.1","noaa_urn:oid:2.49.0.1.840.0.0336ba0131070f8e1ff3ed5c71757bb9b8c66df8.001.1"] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 52/100, near Hendersonville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.