This alert is in force until 1 September 2026, 00:30 UTC.
It is the 5th strongest of the 9 detections recorded within 20 km of this point since 15 June 2026. The last comparable one was on 14 August 2026.
What the source measured
NOAA reported: Flash Flood Warning issued August 31 at 2:35PM MST until August 31 at 5:30PM MST by NWS Flagstaff AZ
An estimated 84,096 people live within 50 km of this point.
Nearby, since 15 June 2026
- June 15, 2026 · score 39 · 10.5 km
- August 12, 2026 · score 39 · 15.7 km
- July 20, 2026 · score 39 · 16.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 32 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 32 / 100 |
| Our confidence | 81% |
| Coordinates | 34.9325, -112.5931 |
| Nearest City | Prescott Valley (44 km) |
| Population Exposed | 84.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-31T21:35:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.9f569bb82035f193337335d41b2f994c7e09194f.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Yavapai, AZ |
| Headline | Flash Flood Warning issued August 31 at 2:35PM MST until August 31 at 5:30PM MST by NWS Flagstaff AZ |
| Expires | 2026-08-31T17:30:00-07:00 |
| SenderName | NWS Flagstaff AZ |
| 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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 32/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.