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AQD | Phoenix Forecast

Click on each day to view forecast.

Friday Forecast:


Ozone

97 AQI
Max 8-hr Avg: 69 ppb

PM10

51 AQI
24-hr Avg: 55 µg/m3

PM2.5

43 AQI
24-hr Avg: 10.2 µg/m3

Saturday Forecast:

Alert: Ozone High Pollution Advisory in effect for Saturday

Ozone

105 AQI
Max 8-hr Avg: 72 ppb

PM10

37 AQI
24-hr Avg: 40 µg/m3

PM2.5

32 AQI
24-hr Avg: 7.6 µg/m3

Sunday Forecast:

Alert: Ozone High Pollution Advisory in effect for Sunday

Ozone

115 AQI
Max 8-hr Avg: 75 ppb

PM10

35 AQI
24-hr Avg: 38 µg/m3

PM2.5

30 AQI
24-hr Avg: 7.2 µg/m3

Monday Forecast:


Ozone

93 AQI
Max 8-hr Avg: 68 ppb

PM10

49 AQI
24-hr Avg: 53 µg/m3

PM2.5

43 AQI
24-hr Avg: 10.3 µg/m3

Tuesday Forecast:


Ozone

87 AQI
Max 8-hr Avg: 66 ppb

PM10

51 AQI
24-hr Avg: 55 µg/m3

PM2.5

44 AQI
24-hr Avg: 10.6 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
4/19/2024
Saturday
4/20/2024
Sunday
4/21/2024
Monday
4/22/2024
Tuesday
4/23/2024
O3
97
105
115
93
87
PM10
51
37
35
49
51
PM2.5
43
32
30
43
44
Pollutant
FRI
SAT
SUN
MON
TUE
O3
97
105
115
93
87
PM10
51
37
35
49
51
PM2.5
43
32
30
43
44
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns


Forecast Discussion:

An Ozone High Pollution Advisory is in effect for Maricopa County on Saturday and Sunday. Surface stagnation and mostly clear skies will result in an environment conducive for ample ozone formation in the more populated areas of the Phoenix metro. Let's discuss the upcoming weather.

For today, a weak disturbance will supply persistent southwesterly breezes throughout the afternoon with similar ventilation rates to yesterday. By tomorrow (Saturday), ventilation and winds will decrease, resulting in stagnant conditions and increasing temperatures in the valley. Sunday will be similar, with even higher temperatures approaching the upper 90s.

Early next week, active weather will make a return to the desert southwest. Though rain chances will be minimal, ventilation will increase enough to allow ozone levels to drop back into the upper Moderate AQI category.

In regards to air quality, Saturday and Sunday will be the main area of concern as ozone levels are forecast to exceed the federal health standard. Levels will be highest during the afternoon hours, dropping back into the green by nightfall. Particulate matter will be mainly locally driven, with levels dropping over the weekend as traffic activity decreases compared to the work week.

Have a safe and hydrated weekend as the heat makes its return to the desert.

- B. Droppleman
ADEQ Meteorologist


What Flag Should I Fly?

Sunday: Orange
Monday: Yellow

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