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 20 May 2026 at 23:30 UTC. It is kept here as a record.
No stronger detection stands among the 63 recorded within 20 km of this point since 16 March 2026 — 31 others scored the same. The last comparable one was on 16 March 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 20 at 6:43PM EDT until May 20 at 7:30PM EDT by NWS Morristown TN
An estimated 286,915 people live within 50 km of this point.
Nearby, since 16 March 2026
- March 16, 2026 · score 43 · 3.0 km
- May 25, 2026 · score 43 · 7.2 km
- June 8, 2026 · score 43 · 7.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 43 / 100 |
| Our confidence | 79% |
| Coordinates | 35.9475, -83.8800 |
| Nearest City | Knoxville (4 km) |
| Population Exposed | 286.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-20T22:43:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.ada3ecfc7d9e36d0631c224bb068edc99a158c9e.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Anderson, TN; Knox, TN |
| Headline | Severe Thunderstorm Warning issued May 20 at 6:43PM EDT until May 20 at 7:30PM EDT by NWS Morristown TN |
| Expires | 2026-05-20T19:30:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | true |
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.
Want to know when something happens near Knoxville?
Calamity.live data shows a weather event with CalamityScore 43/100, near Knoxville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.