Dust Risk-Based Forecast | Pinal County

Friday

Stagnation: Light stagnation

Wind: Light becoming south to southwest 10-25 mph, gusts 30-35 mph, diminishing late

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 winds

Forecast Discussion:

An approaching upper level low on Friday will bring breezy to gusty winds and blowing dust and the daily PM10 levels may approach the health standard, thus have a high dust risk forecasted. Less in the way of winds on Saturday along with less than favorable (for PM10 spikes) early morning winds at Hidden Valley bring low dust risk. Similar early morning conditions on Sunday mean Hidden Valley shouldn't be a concern from a PM10 perspective. That said, the winds will be stronger on Sunday afternoon as another upper level low pressure system approaches from the northwest. Some spotty blowing dust is possible, though the overall daily levels are predicted to be relatively low, thus a low dust risk. The upper low will pass by to the north on Monday and the afternoon will have similarly strong winds, some spotty blowing dust is possible but once again the daily PM10 concentrations are expected to be kept in check and so have a low dust risk forecast. The early morning conditions at Hidden Valley on Tuesday look to be more promising for PM10 spikes and so have a moderate dust risk. Check back tomorrow for an updated dust risk forecast.

- S.DiBiase
Pinal County Air Quality Meteorologist