This alert expired on 14 August 2026 at 02:30 UTC. It is kept here as a record.
It is the 32nd strongest of the 46 detections recorded within 20 km of this point since 13 April 2026. The last comparable one was on 12 August 2026. 22 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 13 at 4:38PM MST until August 13 at 7:30PM MST by NWS Tucson AZ
An estimated 129,667 people live within 50 km of this point.
Nearby, since 13 April 2026
- August 29, 2026 · score 43 · 6.7 km
- July 26, 2026 · score 39 · 10.9 km
- July 11, 2026 · score 39 · 13.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 37 out of 100, at 87 % 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) | 37 / 100 |
| Our confidence | 87% |
| Coordinates | 31.6831, -110.6096 |
| Nearest City | Sierra Vista (33 km) |
| Population Exposed | 129.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-13T23:38:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.62459d4e532b01b0bbf06e8184d0056e |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Pima, AZ; Cochise, AZ |
| Headline | Flash Flood Warning issued August 13 at 4:38PM MST until August 13 at 7:30PM MST by NWS Tucson AZ |
| Expires | 2026-08-13T19:30:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.62459d4e532b01b0bbf06e8184d0056eed11cf9d.001.1","noaa_urn:oid:2.49.0.1.840.0.fcdff0c3ff8e1bf891ca891cc96b03af9b9c78c6.001.1"] |
| Iem TypeSummary | F |
| Iem City | 1 WNW Sierra Vista |
| Iem County | Cochise |
| Iem State | AZ |
| Iem Wfo | TWC |
| Iem Remark | Arizona St and Hunt Rd intersection flooded with rushing water overspilling ditch. |
| MergedSources | [{"id":"iem_F_31.570_-110.350_1786654800000","source":"iem","severity":"low","severityValue":25,"timestamp":1786654800000,"latitude":31.57,"longitude":-110.35}] |
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 37/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.