Arizona – Arizona Weather Force has issued a Thunderstorm Statement effective from Monday, September 1st into early Tuesday morning, September 2nd, 2025, highlighting a surge in thunderstorm activity across several counties. The forecast includes hit and miss thunderstorms forming over the state’s high terrain, especially near the Mogollon Rim, with powerful outflow winds expected to impact metropolitan regions, including Maricopa and Pinal counties.
Thunderstorm Development and Outflow Dynamics
According to Raiden Storm, Master General Meteorologist at Arizona Weather Force, thunderstorms are forecasted to develop this afternoon across the Mogollon Rim area extending westward to the Prescott forecast zones. These storms will generate outflow winds that will travel downhill, influencing adjacent metro areas.
The most intense storm activity is anticipated in Gila County, with its outflow winds projected to push westward into the eastern half of Maricopa County and the north to northwest portions of Pinal County. This region encompasses communities such as Fountain Hills, Apache Junction, San Tan Valley, and Mesa. Residents can expect:
- Strong outflow winds producing gusts capable of disrupting outdoor activities.
- Dust accumulation leading to reduced visibility, particularly affecting travel safety.
- Hit and miss thunderstorms occurring during the evening hours.
People planning outdoor events like barbecues are advised to prepare meals earlier than usual due to the impending weather conditions.
Impact on Western Arizona and Overnight Storm Activity
The outflow winds from these storms will continue moving through western Arizona, reaching the Colorado River Valley overnight. Additionally, an easterly wave originating from Mexico is expected to trigger renewed thunderstorm activity in La Paz and Yuma counties early Tuesday morning, even before sunrise. This will bring early morning lightning and possibly further gusty winds to those regions.
Looking Ahead: Weather Advisory and Future Forecasts
Arizona Weather Force issues a Weather Advisory when there is a likelihood of hit and miss thunderstorms combined with hazardous conditions such as gusty winds and dust storms. These advisories are communicated in advance to ensure public safety, as timely preparation is critical.
Tomorrow’s forecast will be updated with a focus on the Kingman forecast zone, where storms could move from east to west originating from a convergence zone to the east.
“The first half of September is expected to become more active with storms and damaging outflow winds,” said Raiden Storm. “We’re entering a long-range watch window that demands detailed, high-resolution forecasting to keep communities informed and safe.”
Key Takeaways for Residents
- Thunderstorm Statement effective Sept 1-2, 2025 for multiple Arizona counties.
- Storms forming over Mogollon Rim and adjoining high terrain zones.
- Strong outflow winds expected to impact metro areas, decreasing travel visibility.
- Early morning lightning activity expected in western Arizona areas including La Paz and Yuma counties.
- Residents should prepare for potentially disruptive weather, especially outdoor plans.
