This alert expired on 21 July 2026 at 08:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 45 detections recorded within 20 km of this point since 13 April 2026. The last comparable one was on 18 July 2026. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 20 at 10:12PM MST until July 21 at 1:15AM MST by NWS Tucson AZ
An estimated 347,351 people live within 50 km of this point.
Nearby, since 13 April 2026
- August 10, 2026 · score 43 · 3.0 km
- August 3, 2026 · score 43 · 5.6 km
- July 22, 2026 · score 43 · 15.5 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 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) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 31.4210, -110.7266 |
| Nearest City | Nogales (21 km) |
| Population Exposed | 347.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T05:12:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.9ea91bfc52c35509663fd5e9729bb9ce |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Santa Cruz, AZ; Cochise, AZ; Santa Cruz, AZ |
| Headline | Flash Flood Warning issued July 20 at 10:12PM MST until July 21 at 1:15AM MST by NWS Tucson AZ |
| Expires | 2026-07-21T01:15:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9ea91bfc52c35509663fd5e9729bb9ce2c67c58a.001.1","noaa_urn:oid:2.49.0.1.840.0.3ecda43c049193995f5454da85a25a9fc06ba697.001.1"] |
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 Nogales?
Calamity.live data shows a weather event with CalamityScore 43/100, near Nogales (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.