Dust Risk-Based Forecast | Pinal County

Saturday

Stagnation: Light stagnation

Wind: Light becoming west 5-10 mph

Sunday

Stagnation: Light stagnation

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

Monday

Stagnation: Light stagnation

Wind: Light becoming southwest 7-20 mph, gusts 20-25 mph, diminishing late

Tuesday

Stagnation: No stagnation

Wind: South to southwest 5-15 mph, gusts 25-30 mph, diminishing late

Wednesday

Stagnation: No stagnation

Wind: South to southwest eventually becoming west 10-20 mph, gusts 30-35 mph, diminishing late

Forecast Discussion:

Favorable early morning conditions at Hidden Valley over the weekend (i.e. light easterly), bring moderate dust risk forecasts. Over the next several days, an upper level low pressure system will move down from the Pacific Northwest through California and strengthen as it moves closer to the area. The projected strengthening of the system is a little concerning from the potential wind strength perspective. It may pose the first widespread windblown dust event of 2020 for the middle of next week. The only potential saving grace would be precipitation, still too early to tell exactly how likely it is for the local area to get rain, it's all dependent on the path this developing system takes. An increase in the winds on Monday and Tuesday bring the chance for spotty blowing dust, however at this point, Monday and Tuesday's winds don't appear to be quite strong enough for widespread blowing dust and so have low dust risks. Stronger winds on Wednesday and the chance for rain bring a tough dust risk forecast, as a precaution will have a moderate dust risk. Check back on Monday for an updated dust risk forecast.

- S.DiBiase
Pinal County Air Quality Meteorologist