This alert expired on 20 July 2026 at 06:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 22 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 19 at 11:25PM CDT until July 20 at 1:30AM CDT by NWS Memphis TN
An estimated 66,975 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 13, 2026 · score 39 · 8.0 km
- May 30, 2026 · score 39 · 8.8 km
- July 11, 2026 · score 39 · 14.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100, at 81 % 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) | 39 / 100 |
| Our confidence | 81% |
| Coordinates | 35.6517, -88.8233 |
| Nearest City | Jackson (5 km) |
| Population Exposed | 67.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-20T04:25:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.4b8236d0a35b6326a729f94dc92bdd893f5a4c1c.001.1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Madison, TN |
| Headline | Flood Warning issued July 19 at 11:25PM CDT until July 20 at 1:30AM CDT by NWS Memphis TN |
| Expires | 2026-07-20T01:30:00-05:00 |
| SenderName | NWS Memphis TN |
| HasExactCoords | true |
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 Jackson?
Calamity.live data shows a weather event with CalamityScore 39/100, near Jackson (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.