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AQD | Tucson Forecast

Click on each day to view forecast.

Friday Forecast:


Ozone

80 AQI
Max 8-hr Avg: 64 ppb

PM10

31 AQI
24-hr Avg: 34 µg/m3

PM2.5

23 AQI
24-hr Avg: 5.5 µg/m3

Saturday Forecast:


Ozone

87 AQI
Max 8-hr Avg: 66 ppb

PM10

25 AQI
24-hr Avg: 27 µg/m3

PM2.5

24 AQI
24-hr Avg: 5.7 µg/m3

Sunday Forecast:


Ozone

77 AQI
Max 8-hr Avg: 63 ppb

PM10

24 AQI
24-hr Avg: 26 µg/m3

PM2.5

23 AQI
24-hr Avg: 5.6 µg/m3

Monday Forecast:


Ozone

87 AQI
Max 8-hr Avg: 66 ppb

PM10

27 AQI
24-hr Avg: 29 µg/m3

PM2.5

25 AQI
24-hr Avg: 6.0 µg/m3

Tuesday Forecast:


Ozone

67 AQI
Max 8-hr Avg: 60 ppb

PM10

31 AQI
24-hr Avg: 34 µg/m3

PM2.5

26 AQI
24-hr Avg: 6.2 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
4/19/2024
Saturday
4/20/2024
Sunday
4/21/2024
Monday
4/22/2024
Tuesday
4/23/2024
O3
80
87
77
87
67
PM10
31
25
24
27
31
PM2.5
23
24
23
25
26
Pollutant
FRI
SAT
SUN
MON
TUE
O3
80
87
77
87
67
PM10
31
25
24
27
31
PM2.5
23
24
23
25
26
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns


Forecast Discussion:

Yesterday (Thursday), ozone did not exceed the federal health standard in Tucson. The Saguaro Monument monitor (eastern periphery of Tucson), saw the highest ozone levels, which reached an AQI of 93.

Throughout this forecast period, the Desert Southwest will have a spring-like weather pattern. We'll cycle through a low-pressure wave (today), high pressure (over the weekend), and the approach of another low-pressure wave by Monday/Tuesday. And what makes this pattern suitable for this time of year is the lack of moisture and rain associated with the low-pressure waves. Instead, the most significant changes in the weather will be breezy winds, clouds, and brief shots of cooler temperatures.

Ozone-wise, the active weather pattern should prove beneficial, as winds foster better dispersion of ozone. The days with the stronger winds will be today, Monday, and Tuesday. Nonetheless, over the weekend, high pressure will allow ozone to build-up locally; but increased cloud cover forecast for Sunday may help to reduce ozone. Overall, ozone is forecast in the Moderate AQI category through the period.

Particulate-wise, PM10 (dust) could be elevated in dust-prone areas on the afternoons with the stronger breezes (today, Monday, Tuesday). But outside of those times, PM10 will be mostly locally driven. PM2.5 (smoke) should also follow similar trends. Overall, PM10 and PM2.5 are forecast in the Good AQI category through the period.

Check back on Monday for the next Tucson Air Quality Forecast!

- M. Graves
ADEQ Meteorologist


What Flag Should I Fly?

Sunday: Yellow
Monday: Yellow

Ozone and Your Health

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 ozone 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 | View Ozone Fact Sheet >

Please help reduce ozone by doing one or more of the following:

  • Drive as little as possible, carpool, use public transit or telecommute
  • Re-fuel your vehicle in the evening
  • Avoid waiting in long drive-thru lines, if possible
  • Use low-VOC (Volatile Organic Compounds) or water-based paints, stains, finishes and paint strippers - delay big painting projects
  • Make sure containers of household cleaners, garage and yard chemicals, and other solvents are sealed properly to prevent vapors from evaporating into the air