This alert expired on 22 May 2026 at 23:30 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 16 March 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 22 at 6:33PM EDT until May 22 at 7:30PM EDT by NWS Morristown TN
An estimated 220,218 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 22, 2026 · score 43 · 6.0 km
- May 22, 2026 · score 43 · 9.4 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 78 % 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 | 78% |
| Coordinates | 36.3273, -83.7032 |
| Nearest City | Morristown (39 km) |
| Population Exposed | 220.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-22T22:33:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.bcdf344f5789116494e363f5d175b355 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Claiborne, TN; Grainger, TN; Hancock, TN; Union, TN; Grainger, TN; Knox, TN; Union, TN |
| Headline | Severe Thunderstorm Warning issued May 22 at 6:33PM EDT until May 22 at 7:30PM EDT by NWS Morristown TN |
| Expires | 2026-05-22T19:30:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bcdf344f5789116494e363f5d175b355e63e77db.001.1","noaa_urn:oid:2.49.0.1.840.0.ce0d2f65758bbadc3c1a8db3b089a0d584c782d9.002.1"] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.