Right now
The most recent data we hold from NOAA arrived 9 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 22 July 2026 at 05:45 UTC. It is kept here as a record.
No stronger detection stands among the 84 recorded within 20 km of this point since 11 March 2026 — 61 others scored the same. Another comparable one was recorded here earlier the same day. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 21 at 9:51PM CDT until July 22 at 12:45AM CDT by NWS Nashville TN
Urban PEI: 1,140,299 within a heuristic 50 km radius; not unique people.
Nearby, since 11 March 2026
- March 12, 2026 · score 52 · 4.5 km
- March 11, 2026 · score 52 · 4.5 km
- July 22, 2026 · score 52 · 5.6 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 36.3141, -86.7600 |
| Nearest City | Goodlettsville (5 km) |
| Urban exposure index (PEI) | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-22T02:51:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.2ae5bd72dbc6938c5320b7680c0c4fde |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-07-22T02:51:00.000Z.
First archived: 2026-07-22T03:40:11.773Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Davidson, TN; Robertson, TN; Sumner, TN; Wilson, TN; Macon, TN; Sumner, TN; Davidson, TN; Smith, TN; Wilson, TN and 7 more areas |
| Headline | Flash Flood Warning issued July 21 at 9:51PM CDT until July 22 at 12:45AM CDT by NWS Nashville TN |
| Expires | 2026-07-22T00:45:00-05:00 |
| SenderName | NWS Nashville TN |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2ae5bd72dbc6938c5320b7680c0c4fde7c8d7249.001.1","noaa_urn:oid:2.49.0.1.840.0.adbf6a68fd62f0382f1c44df5405ebaf3015cc85.001.1","noaa_urn:oid:2.49.0.1.840.0.d300c99c4f4af91757d04cd955943286f4459367.001.1","noaa_urn:oid:2.49.0.1.840.0.6e2adea7df7c84a8f9ab27b2ad2717ecf533fde9.001.1","noaa_urn:oid:2.49.0.1.840.0.842082ef38227370178f530852435247a2dd35b7.001.1","noaa_urn:oid:2.49.0.1.840.0.8a2e74cc234ebe3adfe511104307ad29c7c64a31.001.1","noaa_urn:oid:2.49.0.1.840.0.b8d035983111251b307e263d7c9ceec96cd9e045.001.1","noaa_urn:oid:2.49.0.1.840.0.47f0ec9f818d06ddc8d3f1cbc604af12d3c6b3b9.001.1","noaa_urn:oid:2.49.0.1.840.0.3a3a3ef88dd2040104e7339f4851d2e4701a093c.001.1","noaa_urn:oid:2.49.0.1.840.0.59d6567e485467490dffa5eb548fa31789a9746f.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.
Review the area, threshold and delivery channel in your account.
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