This alert expired on 12 August 2026 at 06:30 UTC. It is kept here as a record.
It is the 5th strongest of the 13 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 9 August 2026. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 12 at 12:43AM EDT until August 12 at 2:30AM EDT by NWS Morristown TN
Nearby, since 16 March 2026
- August 8, 2026 · score 34 · 17.8 km
- August 9, 2026 · score 22 · 18.8 km
- July 3, 2026 · score 34 · 20.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 60 % 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) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 35.7683, -85.0612 |
| Nearest City | Cookeville (59 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-12T04:43:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.4852d7cf9e5b3cc266cc117de79f156a |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Blount, TN; Knox, TN; Sevier, TN; Bledsoe, TN; Bradley, TN; Hamilton, TN; McMinn, TN; Meigs, TN; Monroe, TN; Polk, TN; Rhea, TN; Blount, TN; Knox, TN; Loudon, TN; Monroe, TN; Roane, TN and 2 more areas |
| Headline | Flash Flood Warning issued August 12 at 12:43AM EDT until August 12 at 2:30AM EDT by NWS Morristown TN |
| Expires | 2026-08-12T02:30:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4852d7cf9e5b3cc266cc117de79f156af3709c90.001.1","noaa_urn:oid:2.49.0.1.840.0.56c26a134cd6b9107b61b9be21441a199218a01f.001.1","noaa_urn:oid:2.49.0.1.840.0.2fb7162aeb06458d4497c82fe0acd37bda365598.001.1","noaa_urn:oid:2.49.0.1.840.0.0481a5e634549f5328617c2965040d65ad116d66.001.1","noaa_urn:oid:2.49.0.1.840.0.9db587b4926d15197c4eaeeb4c54170aee4c5351.002.1"] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.