This alert expired on 31 August 2026 at 04:00 UTC. It is kept here as a record.
No stronger detection stands among the 10 recorded within 20 km of this point since 12 July 2026 — 9 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Flash Flood Warning issued August 30 at 7:31PM MST until August 30 at 9:00PM MST by NWS Tucson AZ
Nearby, since 12 July 2026
- August 31, 2026 · score 22 · 22.4 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 71 % 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 | 71% |
| Coordinates | 32.2935, -112.2723 |
| Nearest City | Casa Grande (81 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-31T02:31:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Pima, AZ |
| Headline | Flash Flood Warning issued August 30 at 7:31PM MST until August 30 at 9:00PM MST by NWS Tucson AZ |
| Expires | 2026-08-30T21:00:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ca2fbe2c6c50acf6ee971433a90f5e438237313f.001.1","noaa_urn:oid:2.49.0.1.840.0.b665855c389b742634bb945dbea5211cd836d3d0.001.1","noaa_urn:oid:2.49.0.1.840.0.c648a47063b0fc6751172672ad58e94bbdf9f798.001.1"] |
| Iem TypeSummary | 2 |
| Iem City | 10 ENE Ajo |
| Iem County | Pima |
| Iem State | AZ |
| Iem Wfo | TWC |
| Iem Remark | Dust storm east of Ajo moving north. Visibility at least below one mile. Social media photos likely shows as low as one quarter of a mile. |
| MergedSources | [{"id":"iem_2_32.040_-112.320_1788138180000","source":"iem","severity":"low","severityValue":25,"timestamp":1788138180000,"latitude":32.04,"longitude":-112.32},{"id":"iem_2_32.420_-112.710_1788139920000","source":"iem","severity":"low","severityValue":25,"timestamp":1788139920000,"latitude":32.42,"longitude":-112.71}] |
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 Casa Grande (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.