Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Friday Forecast:


Ozone

61 AQI
Max 8-hr Avg: 58 ppb

PM10

48 AQI
24-hr Avg: 52 µg/m3

PM2.5

31 AQI
24-hr Avg: 7.5 µg/m3

Saturday Forecast:


Ozone

64 AQI
Max 8-hr Avg: 59 ppb

PM10

35 AQI
24-hr Avg: 38 µg/m3

PM2.5

34 AQI
24-hr Avg: 8.2 µg/m3

Sunday Forecast:


Ozone

50 AQI
Max 8-hr Avg: 54 ppb

PM10

31 AQI
24-hr Avg: 33 µg/m3

PM2.5

31 AQI
24-hr Avg: 7.4 µg/m3

Monday Forecast:

Notice: Pockets of dust possible

Ozone

48 AQI
Max 8-hr Avg: 52 ppb

PM10

52 AQI
24-hr Avg: 58 µg/m3

PM2.5

25 AQI
24-hr Avg: 6.1 µg/m3

Tuesday Forecast:

Notice: Pockets of dust possible

Ozone

47 AQI
Max 8-hr Avg: 51 ppb

PM10

54 AQI
24-hr Avg: 62 µg/m3

PM2.5

23 AQI
24-hr Avg: 5.5 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
4/3/2020
Saturday
4/4/2020
Sunday
4/5/2020
Monday
4/6/2020
Tuesday
4/7/2020
O3
61
64
50
48
47
PM10
48
35
31
52
54
PM2.5
31
34
31
25
23
Pollutant
FRI
SAT
SUN
MON
TUE
O3
61
64
50
48
47
PM10
48
35
31
52
54
PM2.5
31
34
31
25
23
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Yesterday, ozone finished in the Good Air Quality Index (AQI) category at every monitoring site in the Valley. Decent breezy winds in the early afternoon likely played a role in this.

The main story for this Phoenix air quality forecast will be a relatively strong wave of low pressure that will develop just off the northern coast of California on Sunday and slowly expand into Arizona Monday and Tuesday. This system will primarily bring in cooler air (highs are forecast to drop into the upper 70s by Monday) and stronger winds. Skies are also expected to be mostly sunny as the system will be on the dry side.

For today and Saturday, winds are expected to be light. Therefore, ozone is forecast in the Moderate AQI category. There may even be a chance for some light ozone transport from the west.

Then by Sunday, a deep southerly flow will develop over Arizona, helping to remove the possibility of any transport from the west. This southerly flow will last through at least Tuesday. Additionally, breezy afternoon winds will favor the dispersion of ozone, particularly on Monday and Tuesday. As a result, ozone is forecast in the Good AQI category Sunday through Tuesday.

In regards to particulate matter, both PM10 (dust) and PM2.5 (smoke) are elevated in the usual areas this morning--south/southwest of the Phoenix metro area. This will continue to be possible on any given weekday. Moreover, we can't rule out the possibility of pockets of dust on Monday and/or Tuesday because of the breezy winds.

Check back on Monday for the next Phoenix Air Quality Forecast.

- M. Graves
ADEQ Meteorologist


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Sunday: Green

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