Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Thursday Forecast:

Notice: Blowing dust possible in the evening

Ozone

64 AQI
Max 8-hr Avg: 59 ppb

PM10

61 AQI
24-hr Avg: 76 µg/m3

PM2.5

27 AQI
24-hr Avg: 6.4 µg/m3

Friday Forecast:

Notice: Blowing dust may be possible in the evening

Ozone

80 AQI
Max 8-hr Avg: 64 ppb

PM10

57 AQI
24-hr Avg: 68 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.3 µg/m3

Saturday Forecast:


Ozone

80 AQI
Max 8-hr Avg: 64 ppb

PM10

45 AQI
24-hr Avg: 49 µg/m3

PM2.5

31 AQI
24-hr Avg: 7.4 µg/m3

Sunday Forecast:


Ozone

77 AQI
Max 8-hr Avg: 63 ppb

PM10

44 AQI
24-hr Avg: 47 µg/m3

PM2.5

31 AQI
24-hr Avg: 7.5 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

32 AQI
24-hr Avg: 7.6 µg/m3

Air Quality By Pollutant:

Pollutant
Thursday
7/2/2020
Friday
7/3/2020
Saturday
7/4/2020
Sunday
7/5/2020
Monday
7/6/2020
O3
64
80
80
77
101
PM10
61
57
45
44
53
PM2.5
27
30
31
31
32
Pollutant
THU
FRI
SAT
SUN
MON
O3
64
80
80
77
101
PM10
61
57
45
44
53
PM2.5
27
30
31
31
32
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Today, Arizona will be caught in between two competing weather patterns: low pressure over the Northwest and an expanding high pressure over the midsection of the U.S. This has resulted in a southerly flow over the state and thus, increased moisture over the southern part of the state. Satellite has shown decent cloud cover over Pima County is morning. Radar has also shown some shower activity in the county.

The main concern for Phoenix today is the potential for thunderstorm outflow winds to move into the area from the south. Such winds could result in this monsoon season's first dust storm. However, there is uncertainty in this as it will depend on if cloud cover can clear out soon enough.

Friday and through the weekend, the said high pressure will expand over Arizona. The main impact this will have on Phoenix's weather will be increasing temperatures; highs will approach the 110°F mark by Saturday and hover around there through at least Monday. Monsoon-wise though, the low pressure over the Northwest will prevent the high pressure from sliding into the position where it needs to be for thunderstorms to move toward the Valley from the southern deserts. There may be another chance for dust out of the south tomorrow evening, but blowing dust chances will decrease after that.

In regards to ozone, ozone is forecast to increase back into the Moderate AQI category today through Sunday. But lighter winds on Monday may enable ozone to reach the Unhealthy for Sensitive Groups AQI category.

Lastly, local dust-producing activities on weekday mornings will result in locally elevated PM10 levels.

- M. Graves
ADEQ Meteorologist


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