This alert expired on 9 August 2026 at 23:15 UTC. It is kept here as a record.
No stronger detection stands among the 31 recorded within 20 km of this point since 16 March 2026 — 6 others scored the same. The last comparable one was on 17 July 2026.
What the source measured
NOAA reported: Flash Flood Warning issued August 9 at 4:43PM EDT until August 9 at 7:15PM EDT by NWS Morristown TN
An estimated 270,425 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 30, 2026 · score 37 · 13.5 km
- May 30, 2026 · score 37 · 13.6 km
- July 8, 2026 · score 43 · 15.1 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.
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) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 35.9786, -84.2371 |
| Nearest City | Oak Ridge (5 km) |
| Population Exposed | 270.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-09T20:43:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.8bde75ff45948bbb683db319b1afc498 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Blount, TN; Sevier, TN; Campbell, TN; Rhea, TN |
| Headline | Flash Flood Warning issued August 9 at 4:43PM EDT until August 9 at 7:15PM EDT by NWS Morristown TN |
| Expires | 2026-08-09T19:15:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8bde75ff45948bbb683db319b1afc498da98be8f.001.1","noaa_urn:oid:2.49.0.1.840.0.d8cf30f38ad80c7178858aa13f5d884e31ff43a3.001.1","noaa_urn:oid:2.49.0.1.840.0.d669a6fb888ce2830055d211b36d939491c93d3c.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 Oak Ridge?
Calamity.live data shows a weather event with CalamityScore 43/100, near Oak Ridge (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.