Skip to main content
Click on each day to view forecast.

Tuesday Forecast:

HPA
Alert: PM10 High Pollution Advisory in effect for Tuesday |  Health Impacts >

Ozone

39 AQI
Max 8-hr Avg: 42 ppb

PM10

132 AQI
24-hr Avg: 217 µg/m3

PM2.5

85 AQI
24-hr Avg: 27.2 µg/m3

Wednesday Forecast:

Notice
Notice: Morning dust possible

Ozone

36 AQI
Max 8-hr Avg: 39 ppb

PM10

66 AQI
24-hr Avg: 86 µg/m3

PM2.5

58 AQI
24-hr Avg: 12.7 µg/m3

Thursday Forecast:


Ozone

39 AQI
Max 8-hr Avg: 42 ppb

PM10

40 AQI
24-hr Avg: 43 µg/m3

PM2.5

43 AQI
24-hr Avg: 7.8 µg/m3

Friday Forecast:


Ozone

40 AQI
Max 8-hr Avg: 43 ppb

PM10

57 AQI
24-hr Avg: 68 µg/m3

PM2.5

53 AQI
24-hr Avg: 10.0 µg/m3

Saturday Forecast:


Ozone

40 AQI
Max 8-hr Avg: 43 ppb

PM10

39 AQI
24-hr Avg: 42 µg/m3

PM2.5

44 AQI
24-hr Avg: 8.0 µg/m3

Air Quality By Pollutant:

Pollutant
Tuesday
8/4/2026
Wednesday
8/5/2026
Thursday
8/6/2026
Friday
8/7/2026
Saturday
8/8/2026
O3
39
36
39
40
40
PM10
132
66
40
57
39
PM2.5
85
58
43
53
44
Pollutant
TUE
WED
THU
FRI
SAT
O3
39
36
39
40
40
PM10
132
66
40
57
39
PM2.5
85
58
43
53
44
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns


Forecast Discussion:

Yesterday, all pollutants stayed in the Good AQI range. However thunderstorm outflows did reach the area early this morning which did bring a lot of dust. As a result, today will reach the Unhealthy for Sensitive Groups AQI category. While there is some lingering dust, concentrations have come way down from where they were this morning.

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
Wednesday: Yellow
Air Quality chart showing the air quality to be Yellow for Moderate for this specific time or day. Moderate air quality may be a health concern for those who are unusually sensitive to air pollution.

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)