This alert expired on 30 August 2026 at 06:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 29 detections recorded within 20 km of this point since 15 June 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Flash Flood Warning issued August 29 at 8:36PM MST until August 29 at 11:15PM MST by NWS Tucson AZ
An estimated 780,316 people live within 50 km of this point.
Nearby, since 15 June 2026
- July 16, 2026 · score 48 · 3.8 km
- July 17, 2026 · score 41 · 4.0 km
- June 15, 2026 · score 48 · 15.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 87 % 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) | 48 / 100 |
| Our confidence | 87% |
| Coordinates | 32.5814, -111.1692 |
| Nearest City | Marana (17 km) |
| Population Exposed | 780.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-30T03:36:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Pima, AZ; Pinal, AZ; Gila, AZ and 1 more areas |
| Headline | Flash Flood Warning issued August 29 at 8:36PM MST until August 29 at 11:15PM MST by NWS Tucson AZ |
| Expires | 2026-08-29T23:15:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2a021ab1f95243408ba82c2b9c7b2e97fa65438b.001.1","noaa_urn:oid:2.49.0.1.840.0.5c1b147bea5c9b004930c0886b69690ac2614487.001.1","noaa_urn:oid:2.49.0.1.840.0.bc4599e0d8790b36006d0d1b4267818a1096f25f.001.1","noaa_urn:oid:2.49.0.1.840.0.5547071d8f823acc24db2a743d16741dd1c90942.001.1","noaa_urn:oid:2.49.0.1.840.0.e1f921de2070b5966035a8f471c125fa6e17f024.001.1","noaa_urn:oid:2.49.0.1.840.0.acd8cf045cdee900a06027f2297df52d421d61b9.001.1","noaa_urn:oid:2.49.0.1.840.0.abd9ff9d31f5db24ae1aa575cb477e89f118dd74.001.1","noaa_urn:oid:2.49.0.1.840.0.b6450dbc2633b3205f56632180da74a20de12710.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 4 WSW Tucson |
| Spc County | Pima |
| Spc State | AZ |
| Spc Comments | Pole downed with loss of power to 1800 people. (TWC) |
| MergedSources | [{"id":"spc_wind_32.17_-110.96_36","source":"spc","severity":"medium","severityValue":45,"timestamp":1788061420650,"latitude":32.17,"longitude":-110.96}] |
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 48/100, near Marana (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.