Dust Risk-Based Forecast | Maricopa County

Wednesday

Stagnation: Morning and evening stagnation

Wind: Westerly winds of 5-10 mph

Thursday

Stagnation: Morning and evening stagnation

Wind: Westerly winds of 5-10 mph

Friday

Stagnation: Morning and evening stagnation

Wind: Westerly winds of 5-15 mph

Saturday

Stagnation: Morning and evening stagnation

Wind: Westerly winds of 5-10 mph

Sunday

Stagnation: Morning stagnation

Wind: Southwesterly winds of 10-15 mph

Forecast Discussion:

A wave of low pressure centered over southern Arizona and northwestern Mexico this morning will slowly makes its way southeastward today. This system is expected to result in thunderstorm development in east-central Arizona and Pinal County early this afternoon. For Phoenix, the main concern is the potential for outflow winds to reach the Valley from thunderstorms originating in Pinal County. Since this area is a favorable source for dust, blowing dust may be possible this afternoon/evening.

Beginning Wednesday, high pressure will begin to build over the Southwest. And by Thursday, it will be the dominating weather pattern. On Friday and Saturday, the high pressure will hold on, but it looks to weaken as stronger winds move over the U.S. Northwest. On Sunday, another low pressure system from the Pacific Ocean is projected to approach Arizona. Winds are expected to be mostly light Wednesday through Saturday and look increase again on Sunday.

Overall, the dust risk will be Low through at least Sunday.

- M. Graves
ADEQ Meteorologist