Tucson Forecast

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Air Quality Hourly Forecast | Tucson

Click on each day to view forecast.

Friday Forecast:


Ozone

45 AQI
Max 8-hr Avg: 49 ppb

PM10

23 AQI
24-hr Avg: 25 µg/m3

PM2.5

29 AQI
24-hr Avg: 7.0 µg/m3

Saturday Forecast:


Ozone

44 AQI
Max 8-hr Avg: 47 ppb

PM10

30 AQI
24-hr Avg: 32 µg/m3

PM2.5

35 AQI
24-hr Avg: 8.4 µg/m3

Sunday Forecast:


Ozone

38 AQI
Max 8-hr Avg: 41 ppb

PM10

22 AQI
24-hr Avg: 24 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.1 µg/m3

Monday Forecast:


Ozone

44 AQI
Max 8-hr Avg: 48 ppb

PM10

27 AQI
24-hr Avg: 29 µg/m3

PM2.5

34 AQI
24-hr Avg: 8.1 µg/m3

Tuesday Forecast:


Ozone

41 AQI
Max 8-hr Avg: 44 ppb

PM10

28 AQI
24-hr Avg: 30 µg/m3

PM2.5

35 AQI
24-hr Avg: 8.3 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
9/24/2021
Saturday
9/25/2021
Sunday
9/26/2021
Monday
9/27/2021
Tuesday
9/28/2021
O3
45
44
38
44
41
PM10
23
30
22
27
28
PM2.5
29
35
30
34
35
Pollutant
FRI
SAT
SUN
MON
TUE
O3
45
44
38
44
41
PM10
23
30
22
27
28
PM2.5
29
35
30
34
35
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

A period of unsettled weather will be in store for Arizona over the next several days. First of all, a low pressure disturbance over Arizona this morning (Friday) is providing cloud cover to much of the central part of the state. Some areas have also already seen rain shower activity, as well as thunder and lightning. For Tucson, isolated thunderstorms in/around the area will be possible in the afternoon.

Then Saturday into Sunday, a low pressure circulation will initially linger off the coast of the northern Baja before slowly nudging its way over Arizona. This circulation will provide continued thunderstorm and rain chances for the Tucson area through the weekend. But Saturday night into Sunday morning is currently looking to be the window for the most rain. Breezier winds out of the west-southwest are also expected Sunday afternoon.

Then by Monday, things look to calm down and dry out a bit in the wake of the low pressure circulation. But another low pressure wave is projected to quickly follow by Wednesday.

Overall, air quality is expected to good throughout this forecast period. Cloud cover, rain, and increased atmospheric dispersion over the state are all expected to help limit ozone and particulate matter (PM). Ozone is forecast to be lowest on Sunday because of the low pressure circulation forecast to be overhead by then. The only thing to note here is the potential for brief blowing dust associated with gusty thunderstorm winds.

- M. Graves
ADEQ Meteorologist


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