This alert expired on 30 August 2026 at 07:45 UTC. It is kept here as a record.
It is the 4th strongest of the 17 detections recorded within 20 km of this point since 14 July 2026. The last comparable one was on 22 July 2026.
What the source measured
NOAA reported: Flash Flood Warning issued August 29 at 10:27PM MST until August 30 at 12:45AM MST by NWS Tucson AZ
Nearby, since 14 July 2026
- August 30, 2026 · score 22 · 0.0 km
- July 14, 2026 · score 22 · 19.9 km
- August 30, 2026 · score 22 · 22.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 61 % 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) | 22 / 100 |
| Our confidence | 61% |
| Coordinates | 32.9618, -110.5806 |
| Nearest City | Oro Valley (73 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-30T05:27:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Graham, AZ; Pinal, AZ |
| Headline | Flash Flood Warning issued August 29 at 10:27PM MST until August 30 at 12:45AM MST by NWS Tucson AZ |
| Expires | 2026-08-30T00:45:00-07:00 |
| SenderName | NWS Tucson 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 22/100, near Oro Valley (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.