Dust Risk-Based Forecast | Pinal County

Tuesday

Stagnation: Light stagnation

Wind: Light becoming southwest to west 5-15 mph, gusts to 20 mph

Wednesday

Stagnation: No stagnation

Wind: South to southwest eventually becoming west at 5-20 mph gusts around 25 mph

Thursday

Stagnation: Light stagnation

Wind: Light becoming south to southeast 5-10 mph, outflows (25-35 mph) possible late

Friday

Stagnation: Light stagnation

Wind: Light becoming west 5-12 mph

Saturday

Stagnation: Light stagnation

Wind: Light becoming west 5-12 mph

Forecast Discussion:

High pressure is in control of the local weather today and Tuesday. Heat is the word for the next couple of days as afternoon high temperatures surpass 110 degrees and in some places approach 115 degrees! The National Weather Service in Phoenix has issued an Excessive Heat Warning for portions of South Central Arizona (i.e. Queen Creek, Casa Grande, Florence and Coolidge) which remains in effect until 8 p.m. Tuesday. A trough will approach from the Pacific Northwest towards the middle of the workweek and help drop the temperatures a bit and also bring some breeziness to the area. The particulates are forecast to be in the upper good to mid-moderate range on the AQI scale with Hidden Valley and Stanfield expected to have the highest levels of particulates. At this point don't have any forecasted exceedances of the particulates this week but as is the case during the Monsoon, conditions and forecasts can change rather quickly. The dust risk forecasts are in the moderate category for Tuesday and Thursday through Saturday with low dust risk on Wednesday, mainly due slightly stronger southerly to southwesterly winds forecast in/around Hidden Valley early Wednesday morning so expect lower PM10 levels on Wednesday at that location.

- S.DiBiase
Pinal County Air Quality Meteorologist