Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
This alert expired on 22 July 2026 at 08:30 UTC. It is kept here as a record.
What the source measured
NOAA reported: Flash Flood Warning issued July 22 at 2:41AM CDT until July 22 at 3:30AM CDT by NWS Nashville TN
Urban PEI: 36,800 within a heuristic 50 km radius; not unique people.
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 35.6205, -87.5285 |
| Nearest City | Columbia (44 km) |
| Urban exposure index (PEI) | 36.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-22T07:41:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.59b37e563f7bdc65fe829dee0eeccd5a |
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: 2026-07-22T07:41:00.000Z.
First archived: 2026-07-22T08:20:31.576Z. 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 | Giles, TN; Lawrence, TN; Wayne, TN; Lewis, TN; Maury, TN; Perry, TN; Lewis, TN; Perry, TN and 1 more areas |
| Headline | Flash Flood Warning issued July 22 at 2:41AM CDT until July 22 at 3:30AM CDT by NWS Nashville TN |
| Expires | 2026-07-22T03:30:00-05:00 |
| SenderName | NWS Nashville TN |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.59b37e563f7bdc65fe829dee0eeccd5a4fe8fd20.001.1","noaa_urn:oid:2.49.0.1.840.0.f548e5d030dbdb9699600a92467de688c69a974f.001.1","noaa_urn:oid:2.49.0.1.840.0.3b1d21a263e9c663c91ad96992eadefacc3e55ea.001.1","noaa_urn:oid:2.49.0.1.840.0.ea78354a475e72bc7bcc052bceb5d5db360f1e86.001.1"] |
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.
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