Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Wednesday Forecast:


Ozone

43 AQI
Max 8-hr Avg: 46 ppb

PM10

71 AQI
24-hr Avg: 96 µg/m3

PM2.5

65 AQI
24-hr Avg: 18.9 µg/m3

Thursday Forecast:


Ozone

38 AQI
Max 8-hr Avg: 41 ppb

PM10

70 AQI
24-hr Avg: 93 µg/m3

PM2.5

77 AQI
24-hr Avg: 24.6 µg/m3

Friday Forecast:


Ozone

36 AQI
Max 8-hr Avg: 39 ppb

PM10

62 AQI
24-hr Avg: 78 µg/m3

PM2.5

83 AQI
24-hr Avg: 27.5 µg/m3

Saturday Forecast:


Ozone

37 AQI
Max 8-hr Avg: 40 ppb

PM10

58 AQI
24-hr Avg: 70 µg/m3

PM2.5

73 AQI
24-hr Avg: 22.5 µg/m3

Sunday Forecast:


Ozone

38 AQI
Max 8-hr Avg: 41 ppb

PM10

56 AQI
24-hr Avg: 65 µg/m3

PM2.5

65 AQI
24-hr Avg: 18.9 µg/m3

Air Quality By Pollutant:

Pollutant
Wednesday
11/25/2020
Thursday
11/26/2020
Friday
11/27/2020
Saturday
11/28/2020
Sunday
11/29/2020
O3
43
38
36
37
38
PM10
71
70
62
58
56
PM2.5
65
77
83
73
65
Pollutant
WED
THU
FRI
SAT
SUN
O3
43
38
36
37
38
PM10
71
70
62
58
56
PM2.5
65
77
83
73
65
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Water vapor satellite this morning (Wednesday) shows our next storm system moving into the Pacific Northwest. This system will drop southward into Arizona Thanksgiving Day into Friday. Unfortunately, this storm will stay inland as it drops south, meaning it won't have much moisture with it, so no rain chances in Phoenix. It will help to drop afternoon high temperatures into the upper 60s on Friday.

Breezes are expected to increase just slightly at the surface tomorrow. More importantly, for pollution dispersion, southwest winds will increase into the 10-20mph range above the surface (around 5,000ft), which will help keep PM-2.5 slightly lower than it otherwise would be on a holiday. With that said, with increased fireplace and firepit use likely on Thursday night, coupled with stronger inversions Friday morning, expecting PM-2.5 (smoke) and PM-10 (dust) concentrations to be in the upper Moderate AQI category on Friday, with the highest concentrations during the morning hours. You can help improve air quality this holiday season by Giving the Gift of Clean Air [Learn More].

One other thing we will be watching closely is gusty winds across Western Arizona Thursday and Friday, which will likely produce some areas of blowing dust. Right now, we are not expecting this to transport into Phoenix but would not be surprised to see a bit of haze from dust that will combine with the holiday smoke production to make it look rather hazy Friday morning.

Saturday into the first part of next week, forecasting a ridge of high pressure to build back over the region, which will result in mainly light winds and a warming trend with afternoon high temperatures rising back into the mid-70s by Monday.

Have a great Thanksgiving!

- M. Pace
ADEQ Meteorologist


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Thursday: Yellow
Friday: Yellow

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