Updated 10am MDT Friday, August 12, 2016
Valid through Noon MDT Monday, August 15, 2016
Air quality is forecast to continue to remain in the Good to Moderate air quality category across the state today. All DEQ monitors are currently reading in the GOOD category this morning except for Garden Valley, Nampa, and Boise which are currently reading in the MODERATE category.
Today will continue to experience warming temperatures as an upper level ridge approaches from the west. Wind speeds will be in the 5-15 mph range from the west-northwest with northwest to northeast winds over the Camas Prairie and southwest winds over the Upper Snake River Plain and Purcell Trench. Wind directions over northern Idaho will be generally will be from the west-northwest. Wind speeds at the surface will range from 10-15 mph in southern Idaho and 2-8 mph in northern Idaho. Mixing heights will range from 2,000 feet AGL to 9,000 feet AGL. Similar weather conditions this weekend; however, some minor disturbances will pass through Idaho Saturday and Sunday. Both are expected to be weak and will only bring a slight chance for isolated showers at higher elevations. The ridge will move out of the area on Saturday as the upper level disturbances approach. By Monday, a flat ridge will establish.
Smoke impacts today are expected to continue to be local in nature. Smoke is expected to impact communities near active fires with morning drainage into the Upper Treasure Valley, Stanley region, and Central Idaho Mountains. Transport this afternoon will be to the southeast. This evening will see nocturnal drainage down the Boise-Mores into the Lower Snake River Plain. The Camas Prairie (Fairfield) will see increased drainage smoke as well which will impact the early morning. Tomorrow will see limited impacts across the Upper Treasure Valley in the morning and Northern Magic Valley before clearing to the northeast in the afternoon. Expect a similar pattern through the weekend with morning impacts in the Upper Treasure Valley and Northern Magic Valley with clearing in the afternoon to the northeast.