This alert expired on 4 September 2026 at 03:00 UTC. It is kept here as a record.
It is the 24th strongest of the 41 detections recorded within 20 km of this point since 11 July 2026. The last comparable one was on 3 September 2026.
What the source measured
NOAA reported: Flash Flood Warning issued September 3 at 5:03PM MST until September 3 at 8:00PM MST by NWS Tucson AZ
Nearby, since 11 July 2026
- September 3, 2026 · score 16 · 12.6 km
- August 2, 2026 · score 22 · 13.1 km
- July 12, 2026 · score 22 · 13.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 16 out of 100, at 66 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Our confidence | 66% |
| Coordinates | 32.2076, -110.0441 |
| Nearest City | Tanque Verde (66 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-04T00:03:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.5fd31222a68a20c45856adc45c388d8e82e5994d.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Pinal, AZ; Cochise, AZ; Graham, AZ and 1 more areas |
| Headline | Flash Flood Warning issued September 3 at 5:03PM MST until September 3 at 8:00PM MST by NWS Tucson AZ |
| Expires | 2026-09-03T20:00:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5fd31222a68a20c45856adc45c388d8e82e5994d.001.1","noaa_urn:oid:2.49.0.1.840.0.f2243cc5aacf5e32d3eecea22e1060a2b3fd6a51.001.1","noaa_urn:oid:2.49.0.1.840.0.34d19234f7ac50f5709bfdb6e2197bbc3164b506.001.1","noaa_urn:oid:2.49.0.1.840.0.4a12158e35770d6434ba2ebe092a942e29a39caf.001.1","noaa_urn:oid:2.49.0.1.840.0.52a7d96d35c30525ca224bf6b63ac2d64f2d0e57.001.1","noaa_urn:oid:2.49.0.1.840.0.b6f2d2cd00930e27ad75179e6c5959e5a86a6d8c.001.1","noaa_urn:oid:2.49.0.1.840.0.7d6eff6debd26785d185677b383278ffce38e950.001.1"] |
| Iem TypeSummary | F |
| Iem City | 10 S Safford |
| Iem County | Graham |
| Iem State | AZ |
| Iem Wfo | TWC |
| Iem Remark | Water flowing across area roadways. 1.8 inches of rain so far. |
| MergedSources | [{"id":"iem_R_32.690_-109.710_1788476040000","source":"iem","severity":"low","severityValue":25,"timestamp":1788476040000,"latitude":32.69,"longitude":-109.71},{"id":"iem_F_32.690_-109.710_1788475200000","source":"iem","severity":"low","severityValue":25,"timestamp":1788475200000,"latitude":32.69,"longitude":-109.71}] |
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 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 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.