Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Friday Forecast:


Ozone

84 AQI
Max 8-hr Avg: 65 ppb

PM10

52 AQI
24-hr Avg: 57 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.2 µg/m3

Saturday Forecast:


Ozone

77 AQI
Max 8-hr Avg: 63 ppb

PM10

42 AQI
24-hr Avg: 45 µg/m3

PM2.5

28 AQI
24-hr Avg: 6.6 µg/m3

Sunday Forecast:


Ozone

84 AQI
Max 8-hr Avg: 65 ppb

PM10

39 AQI
24-hr Avg: 42 µg/m3

PM2.5

28 AQI
24-hr Avg: 6.8 µg/m3

Monday Forecast:

Alert: Ozone High Pollution Advisory possible on Monday

Ozone

101 AQI
Max 8-hr Avg: 71 ppb

PM10

53 AQI
24-hr Avg: 59 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.3 µg/m3

Tuesday Forecast:

Alert: Ozone High Pollution Advisory possible on Tuesday

Ozone

105 AQI
Max 8-hr Avg: 72 ppb

PM10

53 AQI
24-hr Avg: 60 µg/m3

PM2.5

31 AQI
24-hr Avg: 7.5 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
8/16/2019
Saturday
8/17/2019
Sunday
8/18/2019
Monday
8/19/2019
Tuesday
8/20/2019
O3
84
77
84
101
105
PM10
52
42
39
53
53
PM2.5
30
28
28
30
31
Pollutant
FRI
SAT
SUN
MON
TUE
O3
84
77
84
101
105
PM10
52
42
39
53
53
PM2.5
30
28
28
30
31
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Yesterday, ozone exceeded the federal health standard at one monitor (again): Tonto National Monument. Ozone also managed to reach into the Health Watch Air Quality Index (AQI) range (90-100) at the Pinnacle Peak monitor.

Today and Saturday, a wave of low pressure will graze the Southwest and result in stronger winds over the region. Because of the better dispersion, Phoenix's ozone levels are expected to be lower today and Saturday.

Then on Sunday, high pressure will begin to build over New Mexico and slowly expand over Arizona through Monday and Tuesday. As a result, winds will begin to weaken and conditions will become favorable for ozone accumulation again. For Sunday, ozone is still forecast below the Health Watch AQI range because of high-level clouds forecast to move over Arizona. However, an Ozone High Pollution Advisory (HPA) may be possible on Monday, and Tuesday as well.

In regards to PM10 (dust), no dust issues are currently anticipated for Phoenix during this forecast period. But PM10 is forecast in the Moderate AQI category on weekdays to account for local activity southwest of the Phoenix metro area. Elsewhere around the Valley, PM10 should remain in the Good AQI category.

Monsoon-wise, the monsoon will be inactive through this forecast period, but perhaps we will see it return later next week.

Check back Sunday morning for the next update to the Phoenix Air Quality Forecast.

- M. Graves
ADEQ Meteorologist


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