Tuesday Forecast:
Ozone
Max 8-hr Avg: 42 ppb
PM10
24-hr Avg: 217 µg/m3
PM2.5
24-hr Avg: 27.2 µg/m3
Wednesday Forecast:
Ozone
Max 8-hr Avg: 39 ppb
PM10
24-hr Avg: 86 µg/m3
PM2.5
24-hr Avg: 12.7 µg/m3
Thursday Forecast:
Ozone
Max 8-hr Avg: 42 ppb
PM10
24-hr Avg: 43 µg/m3
PM2.5
24-hr Avg: 7.8 µg/m3
Friday Forecast:
Ozone
Max 8-hr Avg: 43 ppb
PM10
24-hr Avg: 68 µg/m3
PM2.5
24-hr Avg: 10.0 µg/m3
Saturday Forecast:
Ozone
Max 8-hr Avg: 43 ppb
PM10
24-hr Avg: 42 µg/m3
PM2.5
24-hr Avg: 8.0 µg/m3
Air Quality By Pollutant:
8/4/2026
8/5/2026
8/6/2026
8/7/2026
8/8/2026
Forecast Discussion:
Looking ahead, there will continue to be chances for strong thunderstorms over southeastern Arizona and northern Mexico each afternoon. With these storms, there is potential for outflow winds to reach the Yuma area like we saw this morning. Since these outflows have to travel such a far distance to reach Yuma, it is difficult to have a lot of confidence on which days will have the most impact on Yuma. That said, we are forecasting tomorrow morning and Friday morning to have the greatest potential for more dust. Therefore, we are forecasting Moderate AQI levels on those days.
Switching to ozone, we don't expect any concerns. Predominately southerly winds should help to keep ozone levels low. Ozone is forecast to stay in the Good AQI range through the forecast period.
- R. Nicoll
ADEQ Meteorologist
What Flag Should I Fly?
Tuesday: Orange
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Wednesday: Yellow
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Particulate Matter and Your Health - PM10 (Dust) and PM2.5 (Smoke)
People most vulnerable to the impacts of air pollution include children, older adults, adults exercising outdoors, people with heart or lung disease, and those suffering from asthma and bronchitis. Exposure to particulate matter can increase the number and severity of asthma attacks, cause or aggravate bronchitis or other lung disease, and reduce the body's ability to fight infection. Symptoms may include itchy eyes, nose and throat, wheezing, coughing, shortness of breath, chest pain and upper respiratory issues. The size of particles is directly linked to their potential for causing health problems. Small particles of concern include "fine particles" (such as those found in smoke and haze), which are 2.5 microns or less in size; and "coarse particles" (such as those found in wind-blown dust), which have diameters between 2.5 and 10 microns. These small particles, some much smaller in diameter than a human hair, pose the greatest problems because they can get deep into your lungs, and some may even get into your bloodstream | View ADEQ Particulate Matter Fact Sheet >
- Use gas or electric instead of burning wood
- Limit the lighting of fireworks
- Ride transit, carpool or telework
- Eliminate all unnecessary driving and/or combine trips
- Avoid dirt roads
- Avoid the use of leaf blowers
- If burning wood for heat or food preparation, use dry wood (burning wet wood releases more particulate matter)