Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Friday Forecast:


Ozone

77 AQI
Max 8-hr Avg: 63 ppb

PM10

53 AQI
24-hr Avg: 59 µg/m3

PM2.5

28 AQI
24-hr Avg: 6.6 µg/m3

Saturday Forecast:

Alert: Ozone Health Watch in effect for Saturday

Ozone

93 AQI
Max 8-hr Avg: 68 ppb

PM10

44 AQI
24-hr Avg: 48 µg/m3

PM2.5

27 AQI
24-hr Avg: 6.4 µg/m3

Sunday Forecast:

Alert: Ozone Health Watch in effect for Sunday

Ozone

90 AQI
Max 8-hr Avg: 67 ppb

PM10

38 AQI
24-hr Avg: 41 µg/m3

PM2.5

26 AQI
24-hr Avg: 6.3 µg/m3

Monday Forecast:


Ozone

84 AQI
Max 8-hr Avg: 65 ppb

PM10

53 AQI
24-hr Avg: 59 µg/m3

PM2.5

28 AQI
24-hr Avg: 6.8 µg/m3

Tuesday Forecast:


Ozone

80 AQI
Max 8-hr Avg: 64 ppb

PM10

52 AQI
24-hr Avg: 58 µg/m3

PM2.5

27 AQI
24-hr Avg: 6.4 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
7/19/2019
Saturday
7/20/2019
Sunday
7/21/2019
Monday
7/22/2019
Tuesday
7/23/2019
O3
77
93
90
84
80
PM10
53
44
38
53
52
PM2.5
28
27
26
28
27
Pollutant
FRI
SAT
SUN
MON
TUE
O3
77
93
90
84
80
PM10
53
44
38
53
52
PM2.5
28
27
26
28
27
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

Ozone will be the main pollutant of interest for this Phoenix Air Quality Forecast. The good news is that cloud cover over the Valley this morning is expected to help limit ozone levels today. As a result, today's ozone forecast was decreased and the Health Watch is no longer in effect. However, an Ozone Health Watch has been issued for Saturday and Sunday as ozone levels look to have the potential to reach the Air Quality Index (AQI) range of 90-100.

By Monday, a monsoonal high pressure pattern is expected to center itself over the Four Corners region, which is the ideal position for thunderstorms in the Valley. In general, winds will be light during the day and therefore favorable for ozone accumulation. However, cloud cover is currently expected to be a limiting factor. For now, ozone is forecast just below the Health Watch range Monday and Tuesday, but this could change.

Back to thunderstorms--Monday and Tuesday look like they could be active thunderstorm days for the Valley. This also implies the potential for blowing dust or a dust storm ahead of the thunderstorms. Though not currently reflected in the PM10 (dust) forecast, if confidence increases for a dust storm, the PM10 forecast could dramatically change next week. For now, PM10 is forecast in the Moderate AQI category on weekdays to account for local activity southwest of the Phoenix metro area.

- M. Graves
ADEQ Meteorologist


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