Dust Risk-Based Forecast | Pinal County

Saturday

Stagnation: Light stagnation

Wind: Light becoming west 5-12 mph

Sunday

Stagnation: Light stagnation

Wind: Light becoming southwest to west 5-15 mph, gusts 20-25 mph, diminishing late

Monday

Stagnation: No stagnation

Wind: Light becoming west 5-15 mph, gusts 20-25 mph, diminishing late

Tuesday

Stagnation: Light stagnation

Wind: Light becoming west 5-10 mph

Wednesday

Stagnation: Light stagnation

Wind: Light winds

Forecast Discussion:

A noticeable change in the temperatures this weekend as afternoon highs drop back into the low perhaps mid-90s, thanks to an upper level low pressure system that moves into the area from the west and up and over the state by early Saturday. Early morning wind conditions around Hidden Valley will be from directions that typically bring lower PM10 concentrations and the other PM10 monitoring locations are forecast to have daily levels in the good to low moderate range on the AQI scale, thus low dust risks through Monday. Some occasional breeziness especially Sunday afternoon and again on Monday as an upper level low pressure system from the Pacific Northwest moves closer and eventually by well to our north. More in the way of favorable early morning wind conditions at Hidden Valley bring expected PM10 spikes for Tuesday and Wednesday of next week, thus moderate dust risks. Check back on Monday for an updated dust risk forecast.

- S.DiBiase
Pinal County Air Quality Meteorologist