This alert expired on 21 July 2026 at 21:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 134 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 27 June 2026.
What the source measured
NOAA reported: Tornado Warning issued July 21 at 4:37PM EDT until July 21 at 5:00PM EDT by NWS Louisville KY
An estimated 231,442 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 22, 2026 · score 43 · 5.3 km
- July 22, 2026 · score 48 · 7.1 km
- June 9, 2026 · score 43 · 11.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 67 out of 100, at 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 67 / 100 |
| Our confidence | 79% |
| Coordinates | 37.8117, -85.5417 |
| Nearest City | Elizabethtown (31 km) |
| Population Exposed | 231.4K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-07-21T20:37:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.3cddcee1ea48f480d3a8f78e2c5a8994e30af78e.002.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Nelson, KY |
| Headline | Tornado Warning issued July 21 at 4:37PM EDT until July 21 at 5:00PM EDT by NWS Louisville KY |
| Expires | 2026-07-21T17:00:00-04:00 |
| SenderName | NWS Louisville KY |
| 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 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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 67/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.