Wind: Light breezes in the morning, becoming more light and variable in the afternoon
Sunday
Stagnation: Morning and evening stagnation
Wind: Mostly light winds
Monday
Stagnation: Morning and evening stagnation
Wind: Mostly light winds, southerly in the afternoon
Tuesday
Stagnation: No stagnation
Wind: Southerly winds initially, becoming southwesterly then westerly throughout the day, 10-25 mph with higher gusts
Wednesday
Stagnation: Morning and evening stagnation
Wind: Mostly light winds
Discussion
After a fairly quiet week, the weather pattern over the western U.S. will enter into an active phase again.
Today (Friday), a low-pressure wave advancing into Arizona will kick things off, bringing in cooler air and a brief pulse of moisture that will give Pinal County some rain chances this afternoon. In fact, gusty thunderstorm winds out the south are looking more and more likely. These winds could result in brief blowing dust, then help initiate rain. Any rain will help to drop dust (PM10) levels back down.
Then for Saturday and Sunday, things will calm down a bit. The main weather story will be much cooler temperatures in the wake of today's wave. Cloud cover should also linger into Saturday, then clear up more by Sunday. During this time, local PM10 levels should remain relatively low.
Then by Monday, PM10 will likely increase in the morning from local activities. But by Tuesday, our next weather system will arrive, bringing in another round of rain and helping to reduce PM10.
For now, the dust risk is Low each day.
Check back again on Monday morning for the next dust risk outlook.
