Overview
- A large wall of dust moved through the Phoenix metro Sunday night and dropped visibility to near zero, producing life‑threatening driving conditions on major corridors.
- The Federal Aviation Administration imposed a ground stop at Phoenix Sky Harbor that delayed inbound flights at least 45 minutes and contributed to dozens of delays, cancellations and diversions.
- Outflow winds gusting around 40 mph led to Dust Storm Warnings for I‑10, I‑8 and US‑60 and caused localized power outages that affected thousands of Salt River Project customers in areas such as Avondale and near San Tan Valley.
- Rain totals were highly uneven, with more than three‑quarters of an inch reported near the Superstition Mountains while official Sky Harbor totals remained low, and forecasts call for 20–40% daily storm chances with higher odds late Tuesday and Thursday–Friday.
- Emergency agencies and the National Weather Service urged motorists to follow dust‑storm safety guidance, including the directive to 'Pull aside, stay alive,' and warned residents to expect ongoing threats to travel, power and aviation through the active monsoon period.