Dust Risk-Based Forecast | Maricopa County

Updated On: 09/25/20 - 9:00 AM       [View Previous Forecast]

Saturday

Stagnation: Morning and evening stagnation

Wind: Southwesterly winds 5-10 mph

Sunday

Stagnation: Morning and evening stagnation

Wind: Southwesterly winds 5-10 mph

Monday

Stagnation: Morning and evening stagnation

Wind: Northeast winds 5-10 mph

Tuesday

Stagnation: Morning and evening stagnation

Wind: East-northeast winds 5-10 mph

Wednesday

Stagnation: Morning and evening stagnation

Wind: Light easterly winds

Forecast Discussion:

Dust levels this morning are the highest we've seen this week with several monitors observing large PM10 spikes. Concentrations should settle down by late morning with the heating of the day helping improve atmospheric mixing. We should see improvement over the weekend with a weak mid-level trough helping improve ventilation. A ridge building in over the west coast next week will likely cause particulate levels to trend back up, but at this time we aren't expecting levels to get high enough to have to increase the risk level.

- R. Nicoll
ADEQ Meteorologist