Tucson Forecast

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Air Quality Hourly Forecast | Tucson

Click on each day to view forecast.

Wednesday Forecast:


Ozone

50 AQI
Concentration: 54 ppb

PM10

26 AQI
Concentration: 28 µg/m3

Thursday Forecast:


Ozone

64 AQI
Concentration: 59 ppb

PM10

34 AQI
Concentration: 37 µg/m3

Friday Forecast:


Ozone

80 AQI
Concentration: 64 ppb

PM10

33 AQI
Concentration: 36 µg/m3

Saturday Forecast:


Ozone

84 AQI
Concentration: 65 ppb

PM10

28 AQI
Concentration: 30 µg/m3

Sunday Forecast:


Ozone

84 AQI
Concentration: 65 ppb

PM10

27 AQI
Concentration: 29 µg/m3


Air Quality By Pollutant:

Pollutant
Wednesday
8/15/2018
Thursday
8/16/2018
Friday
8/17/2018
Saturday
8/18/2018
Sunday
8/19/2018
O3
50
64
80
84
84
PM10
26
34
33
28
27
Pollutant
WED
THU
FRI
SAT
SUN
O3
50
64
80
84
84
PM10
26
34
33
28
27
O3 = Ozone, PM10 = Particles ≤ 10 microns

Forecast Discussion:

Ozone ended up in the Good Air Quality Index (AQI) category at every ozone monitor in the Tucson area yesterday. Ozone levels were already lower in the morning from the previous day and thunderstorm clouds in the afternoon likely helped to keep ozone levels lower.

As of 8 AM this morning, clouds have taken over the skies over Tucson. Scattered showers have even moved through the area. This weather is expected to help delay ozone formation. Since ozone formation typically gets started in the morning, depending on how long the cloud cover stays around, ozone may be prevented from reaching higher levels in the afternoon. Thus, ozone has been forecast in the Good AQI category today. The morning's cloud cover will also delay daytime heating, which should push thunderstorm formation later in the day.

Looking ahead, thunderstorms will continue to be possible each afternoon, but coverage looks to gradually decrease toward the weekend as high pressure begins to move directly overhead. It's this movement of the high pressure that is also expected to help ozone levels increase later in the week. For now, ozone is forecast in the Moderate AQI category each day after today.

No issues with PM10 (dust) are expected, save for the possibility of local activity near the Rillito monitor.

- M. Graves
ADEQ Meteorologist


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