Wind: Mostly light winds throughout the day; southwesterly breezes of 10-20 mph possible in the evening
Friday
Stagnation: Morning stagnation
Wind: Light winds in the morning, increasing out of the northwest in the afternoon, 10-15mph; southwesterly breezes of 10-20 mph possible in the evening
Saturday
Stagnation: Morning stagnation
Wind: Light winds in the morning, increasing out of the west in the afternoon, 10-15 mph; southwesterly breezes possible in the evening
Sunday
Stagnation: Morning stagnation
Wind: Light winds in the morning; west-southwesterly and 10-20 mph in the afternoon and evening
Monday
Stagnation: Morning stagnation
Wind: Light winds in the morning; west-southwesterly and 10-15 mph in the afternoon and evening
Discussion
This evening, Pinal County could see its first strong thunderstorm outflow winds of the summer. These winds would/will originate from thunderstorms to the east. Blowing dust will be possible, even significant dust could be possible. Uncertainty makes it hard to pin down how high PM10 levels could reach. This will be the first test of the season, to see how much dust might be out there.
After today, there will be more opportunities for wind-driven dust this week: tomorrow evening and during the afternoons over the weekend. Moderate levels of PM10 will be possible.
Lastly, per usual, we can't rule out elevated PM10 levels from local activities, particularly on weekday mornings.
For now, the dust risk is Moderate on Thursday (mainly for the Hidden Valley area) and Low the rest of the period for now.
