This alert expired on 25 May 2026 at 05:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 12 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 16 March 2026.
What the source measured
NOAA reported: Flash Flood Warning issued May 24 at 9:20PM EDT until May 25 at 1:15AM EDT by NWS Peachtree City GA
Nearby, since 16 March 2026
- July 12, 2026 · score 34 · 5.6 km
- July 29, 2026 · score 46 · 20.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 65 % 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 | 65% |
| Coordinates | 35.1983, -84.2859 |
| Nearest City | Cleveland (54 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-25T01:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.4be6b24e6e75608b198f115b46c91e2c |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Cherokee, GA; Cobb, GA; Loudon, TN; McMinn, TN; Monroe, TN; Roane, TN; Blount, TN; Knox, TN |
| Headline | Flash Flood Warning issued May 24 at 9:20PM EDT until May 25 at 1:15AM EDT by NWS Peachtree City GA |
| Expires | 2026-05-25T01:15:00-04:00 |
| SenderName | NWS Peachtree City GA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4be6b24e6e75608b198f115b46c91e2c03334c6a.001.1","noaa_urn:oid:2.49.0.1.840.0.8c7464ea075f2c314450ac11dcd4b171ecc8e953.001.1","noaa_urn:oid:2.49.0.1.840.0.d1556efc5219b0a51f62db52ae5cf93e3bf400a2.001.1"] |
| Iem TypeSummary | F |
| Iem City | 1 ENE Loudon |
| Iem County | Loudon |
| Iem State | TN |
| Iem Wfo | MRX |
| Iem Remark | Several roadways flooded. |
| MergedSources | [{"id":"iem_F_35.740_-84.340_1779667860000","source":"iem","severity":"low","severityValue":25,"timestamp":1779667860000,"latitude":35.74,"longitude":-84.34}] |
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.