Phoenix Forecast

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Air Quality Hourly Forecast | Phoenix

Click on each day to view forecast.

Wednesday Forecast:

Alert: Ozone and PM10 High Pollution Advisories in effect for Wednesday
Notice: Haze in the morning with blowing dust possible in the afternoon

Ozone

108 AQI
Concentration: 73 ppb

PM10

116 AQI
Concentration: 186 µg/m3

PM25

56 AQI
Concentration: 14.3 µg/m3

Thursday Forecast:

Alert: Ozone High Pollution Advisory in effect for Thursday
Notice: Haze in the morning

Ozone

112 AQI
Concentration: 74 ppb

PM10

58 AQI
Concentration: 70 µg/m3

PM25

38 AQI
Concentration: 9 µg/m3

Friday Forecast:

Alert: Ozone High Pollution Advisory possible on Friday

Ozone

108 AQI
Concentration: 73 ppb

PM10

46 AQI
Concentration: 50 µg/m3

PM25

30 AQI
Concentration: 7.2 µg/m3

Saturday Forecast:

Alert: Ozone High Pollution Advisory possible on Saturday

Ozone

105 AQI
Concentration: 72 ppb

PM10

42 AQI
Concentration: 45 µg/m3

PM25

33 AQI
Concentration: 8 µg/m3

Sunday Forecast:

Alert: Ozone High Pollution Advisory possible on Sunday

Ozone

115 AQI
Concentration: 75 ppb

PM10

46 AQI
Concentration: 50 µg/m3

PM25

30 AQI
Concentration: 7.1 µg/m3

Air Quality By Pollutant:

Pollutant
Wednesday
8/15/2018
Thursday
8/16/2018
Friday
8/17/2018
Saturday
8/18/2018
Sunday
8/19/2018
O3
108
112
108
105
115
CO
7
6
6
7
8
PM10
116
58
46
42
46
PM2.5
56
38
30
33
30
Pollutant
WED
THU
FRI
SAT
SUN
O3
108
112
108
105
115
CO
7
6
6
7
8
PM10
116
58
46
42
46
PM2.5
56
38
30
33
30
O3 = Ozone, CO = Carbon Monoxide, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns

Forecast Discussion:

The Valley was hit with two dust events since yesterday afternoon. The first dust storm moved in around 7 pm from the northeast and the second moved in from the south-southeast around 2 am. With no widespread rain around the Valley overnight and cloudy skies this morning, the dust is now left sitting over the region resulting in hazy conditions with the visibility at Phoenix Sky Harbor dropping to 6 miles. Expecting the haze to last through the day before another chance of dust moves into the forecast this evening. As a result, a High Pollution Advisory for PM10 has been issued for the Valley today.

As for the weather this afternoon, the monsoon high will generally be centered over the Arizona/New Mexico border which will continue the south/southeast flow that will keep moisture streaming into the region. We are also watching two disturbances; the first is in southern Arizona this morning resulting in cloud cover and some isolated storms. The second is seen on water vapor moving up the Gulf of California and will likely result in a surge of moisture overnight into tomorrow morning. For today, the main threat for the Valley will be blowing dust from the south/southeast this afternoon/evening followed by a chance of thunderstorms later tonight into tomorrow morning.

Later tomorrow into the weekend, the high will shift and be centered over southern California which will result in drier air moving into the region and a downward trend in storm chances for the Valley. This will also result in clear skies and slightly less wind allowing ozone to become a concern across Phoenix. As a result, an Ozone High Pollution Advisory is in effect for tomorrow with additional advisories possible Friday through Sunday.

- M. Pace
ADEQ Meteorologist


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