Dust Risk-Based Forecast | Pinal County

Tuesday

Stagnation: Light stagnation

Wind: Light becoming west 5-12 mph

Wednesday

Stagnation: Light stagnation

Wind: Light becoming southwest 4-10 mph

Thursday

Stagnation: Light stagnation

Wind: Light becoming west 5-15 mph

Friday

Stagnation: Light stagnation

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

Saturday

Stagnation: Light stagnation

Wind: Light becoming west 5-10 mph

Forecast Discussion:

Little variation in day to day weather since no weather systems of significance are expected. Light early morning winds and occasionally stagnant conditions will help trap local derived pollutants (i.e. PM10), so the dust risk forecasts going out several days are highly dependent on the local activities. The obvious driver to the dust risk forecasts is the Hidden Valley monitor. That said, outside of the three PM10 exceedance days at Hidden Valley in 2019 (last one was this past Saturday), there have been only two other days where Hidden Valley has reached the high dust risk range since April and so have moderate dust risks out for the first four days in the forecast period. Check back tomorrow for an updated dust risk forecast.

- S.DiBiase
Pinal County Air Quality Meteorologist