Maricopa County Forecast
Risk Scale
Air Quality Dust RiskUPDATED: Fri. Jun 22, 2018 8:25 AM
This report is updated Monday through Friday and is valid for Maricopa County, Arizona
Saturday 6/23/2018

LOW
Winds:South-southwest winds 10-15mph
Stagnation:Morning stagnation
Sunday 6/24/2018

LOW
Winds:Westerly winds 10-15mph
Stagnation:Morning stagnation
Monday 6/25/2018

LOW
Winds:Westerly winds 5-10mph
Stagnation:Morning and evening stagnation
Tuesday 6/26/2018

LOW
Winds:Westerly winds 5-10mph
Stagnation:Morning and evening stagnation
Wednesday 6/27/2018

LOW
Winds:Westerly winds 5-10mph
Stagnation:Morning and evening stagnation


Synopsis & Discussion
Forecaster: -M. Pace
Today, high pressure is beginning to shift to the south and west as a weak weather disturbance brushes the state to the north. This will increases breezes slightly this afternoon but still thinking there will be enough ozone production to result in the third exceedance in a row. As a result, an Ozone High Pollution Advisory is in effect today for Phoenix.

This weekend, still forecasting several more weak weather disturbances to brush by the state allowing afternoon breezes to increase. High pressure will quickly move back over the region to start next week which will mean much calmer winds and clear skies.

As for PM-10 (dust), the effects of the rain that moved through parts of the Valley last weekend have all but evaporated as morning spikes are once again occurring, allowing PM-10 to rise into the low Moderate AQI category each day which will equate to a low risk.
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Main Office
1110 W.Washington Street
Phoenix, AZ 85007
P: 602.771.2300
azdeq.gov