This alert expired on 22 July 2026 at 05:00 UTC. It is kept here as a record.
It is the 12th strongest of the 54 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 15 July 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued July 21 at 6:11PM EDT until July 22 at 1:00AM EDT by NWS Morristown TN
An estimated 278,730 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 28, 2026 · score 43 · 0.0 km
- July 27, 2026 · score 43 · 0.0 km
- July 22, 2026 · score 43 · 0.0 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 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) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 35.5000, -86.6000 |
| Nearest City | Shelbyville (13 km) |
| Population Exposed | 278.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T22:11:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.7a5c2b72a723dd8ec409918bbf5d866b |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Anderson, TN; Campbell, TN; Claiborne, TN; Hancock, TN; Morgan, TN; Scott, TN; Union, TN; Lee, VA; Wise, VA; City of Norton, VA; Benton, TN; Carroll, TN; Decatur, TN; Dyer, TN; Gibson, TN; Henderson, TN; Henry, TN; Lake, TN; Obion, TN; Weakley, TN; Cannon, TN; Cheatham, TN; Clay, TN; Cumberland, TN; Davidson, TN; De Kalb, TN; Dickson, TN; Fentress, TN; Hickman, TN; Houston, TN; Humphreys, TN; Jackson, TN; Macon, TN; Montgomery, TN; Overton, TN; Perry, TN; Pickett, TN; Putnam, TN; Robertson, TN; Rutherford, TN; Smith, TN; Stewart, TN; Sumner, TN; Trousdale, TN; White, TN; Williamson, TN; Wilson, TN |
| Headline | Severe Thunderstorm Watch issued July 21 at 6:11PM EDT until July 22 at 1:00AM EDT by NWS Morristown TN |
| Expires | 2026-07-22T01:00:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | false |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7a5c2b72a723dd8ec409918bbf5d866b72b1fee8.001.1","noaa_urn:oid:2.49.0.1.840.0.5c623212f83f4f9aa6f59b539562fce33352d5a4.001.1","noaa_urn:oid:2.49.0.1.840.0.4a1c2283c28f0fa46531f0466d788515a7e5642d.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.
Want to know when something happens near Shelbyville?
Calamity.live data shows a weather event with CalamityScore 43/100, near Shelbyville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.