This alert expired on 18 July 2026 at 00:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 50 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 11 July 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 17 at 4:40PM CDT until July 17 at 7:45PM CDT by NWS Nashville TN
An estimated 1,144,843 people live within 50 km of this point.
Nearby, since 16 March 2026
- March 16, 2026 · score 58 · 9.7 km
- July 11, 2026 · score 52 · 11.9 km
- July 2, 2026 · score 52 · 14.9 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, at 80 % 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) | 52 / 100 |
| Our confidence | 80% |
| Coordinates | 36.2168, -87.0825 |
| Nearest City | Nashville (28 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-17T21:40:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.27533fafa6b2a5ca6d25e010e638ac0d |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Cheatham, TN; Dickson, TN; Montgomery, TN; Robertson, TN; Cheatham, TN; Davidson, TN; Dickson, TN; Hickman, TN; Maury, TN; Williamson, TN |
| Headline | Flash Flood Warning issued July 17 at 4:40PM CDT until July 17 at 7:45PM CDT by NWS Nashville TN |
| Expires | 2026-07-17T19:45:00-05:00 |
| SenderName | NWS Nashville TN |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.27533fafa6b2a5ca6d25e010e638ac0df3ec0ed1.001.1","noaa_urn:oid:2.49.0.1.840.0.7d38f437e16df8aa5fef272786e58f325adfb750.001.1"] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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 Nashville?
Calamity.live data shows a weather event with CalamityScore 52/100, near Nashville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.