This alert expired on 18 July 2026 at 22:02 UTC. It is kept here as a record.
It is the 6th strongest of the 40 detections recorded within 20 km of this point since 24 June 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: Flash Flood Warning issued July 18 at 2:52PM MST until July 18 at 3:00PM MST by NWS Tucson AZ
An estimated 347,351 people live within 50 km of this point.
Nearby, since 24 June 2026
- July 21, 2026 · score 43 · 1.9 km
- August 6, 2026 · score 63 · 7.0 km
- July 28, 2026 · score 43 · 13.8 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 79 % 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 | 79% |
| Coordinates | 31.4412, -110.4672 |
| Nearest City | Sierra Vista (20 km) |
| Population Exposed | 347.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T21:52:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.6ad5c6e742cf19dc8a7eeebab5e4b860 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Cochise, AZ; Santa Cruz, AZ |
| Headline | Flash Flood Warning issued July 18 at 2:52PM MST until July 18 at 3:00PM MST by NWS Tucson AZ |
| Expires | 2026-07-18T15:02:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6ad5c6e742cf19dc8a7eeebab5e4b8609fd80ed6.001.1","noaa_urn:oid:2.49.0.1.840.0.7b93d05446db25b5bd51b9f77a4dec219cde2cbb.001.1","noaa_urn:oid:2.49.0.1.840.0.7fb350597e4a54375fc3f3c0b3c529f0987d2ed7.001.1"] |
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 Sierra Vista?
Calamity.live data shows a weather event with CalamityScore 43/100, near Sierra Vista (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.