Right now
The most recent data we hold from NOAA arrived 5 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 22 July 2026 at 02:00 UTC. It is kept here as a record.
No stronger detection stands among the 43 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. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 21 at 8:17PM CDT until July 21 at 9:00PM CDT by NWS Nashville TN
Urban PEI: 1,067,660 within a heuristic 50 km radius; not unique people.
Nearby, since 11 March 2026
- July 22, 2026 · score 52 · 0.6 km
- March 12, 2026 · score 52 · 4.9 km
- March 12, 2026 · score 52 · 7.5 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 52 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 36.3533, -86.6369 |
| Nearest City | Hendersonville (6 km) |
| Urban exposure index (PEI) | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-22T01:17:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.65d3d1838b8b0d71ae2f98de04b93f5f |
Physical priority index · v1. 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: 2026-07-22T01:17:00.000Z.
First archived: 2026-07-22T01:19:22.132Z. 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 | Jackson, TN; Macon, TN; Putnam, TN; Smith, TN; Trousdale, TN; Davidson, TN; Rutherford, TN; Williamson, TN; Wilson, TN; Cheatham, TN; Dickson, TN; Montgomery, TN and 3 more areas |
| Headline | Severe Thunderstorm Warning issued July 21 at 8:17PM CDT until July 21 at 9:00PM CDT by NWS Nashville TN |
| Expires | 2026-07-21T21:00:00-05:00 |
| SenderName | NWS Nashville TN |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["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.bc182d9a7627982e323141985713856041eff5be.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 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.
Review the area, threshold and delivery channel in your account.
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