Tucson Forecast

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Air Quality Hourly Forecast | Tucson

Click on each day to view forecast.

Friday Forecast:

Notice: Brief dust possible in the evening

Ozone

44 AQI
Max 8-hr Avg: 47 ppb

PM10

29 AQI
24-hr Avg: 31 µg/m3

Saturday Forecast:

Notice: Brief dust possible in the evening

Ozone

48 AQI
Max 8-hr Avg: 52 ppb

PM10

26 AQI
24-hr Avg: 28 µg/m3

Sunday Forecast:

Notice: Brief dust possible in the evening

Ozone

49 AQI
Max 8-hr Avg: 53 ppb

PM10

27 AQI
24-hr Avg: 29 µg/m3

Monday Forecast:


Ozone

44 AQI
Max 8-hr Avg: 48 ppb

PM10

26 AQI
24-hr Avg: 28 µg/m3

Tuesday Forecast:


Ozone

43 AQI
Max 8-hr Avg: 46 ppb

PM10

25 AQI
24-hr Avg: 27 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
7/10/2020
Saturday
7/11/2020
Sunday
7/12/2020
Monday
7/13/2020
Tuesday
7/14/2020
O3
44
48
49
44
43
PM10
29
26
27
26
25
Pollutant
FRI
SAT
SUN
MON
TUE
O3
44
48
49
44
43
PM10
29
26
27
26
25
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

It's humid and cloudy this morning in Tucson. Clouds are leftover from thunderstorms that developed just south of the border last night. Today will be similar as the past few days in that afternoon winds will be breezy and out of the northwest. Such winds have proved beneficial for air quality as they've helped to stop local ozone levels from increasing in the afternoons. Thus, ozone should end up in the Good Air Quality Index (AQI) category again today.

The main story this week, as has been much advertised, is the heat. Temperatures will climb today through Sunday, peak on Sunday at around 113°F, and then trend downwards by Monday. But they'll remain hot nonetheless, cruising above 110°F for a few days. The National Weather Service has an Excessive Heat Warning out for today-Monday, so keep that in mind when planning outdoor activities.

Monsoon-wise, there may be a potential for thunderstorm outflow winds to impact the Tucson area in the evenings. But not much in the way of rain is expected for now. Moreover, on any given morning, the Tucson area could see leftover cloud cover from thunderstorms from Mexico.

Considering the recent low ozone trends and northwesterly winds forecast to continue over the Tucson area, ozone levels are forecast to stay relatively low through at least Tuesday. Morning cloud cover could also help to limit ozone levels, depending on how long it sticks around. Ozone levels should be highest on Saturday and Sunday as winds look to be the lightest on these days.

No significant concerns are anticipated for PM10 (dust), though we can't rule out the possibility of brief blowing dust from thunderstorm outflow winds in the evenings (particularly from the west or southwest).

- M. Graves
ADEQ Meteorologist


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