More of the same today. GOOD to MODERATE air quality with some possible UNHEALTHY FOR SENSITIVE GROUPS areas near fires in central and north Idaho.
Limited clearing of smoke expected in the afternoon before smoke and haze moves back in overnight. Smoke and haze lingering when temperatures decrease tonight will become trapped under surface inversions and settle in valleys and low-lying areas until the inversions break the next morning.
HRRR-NCEP Near Surface Smoke initialized 11Z (5
a.m. MDT) 19 September 2025 and valid at 6 p.m. MDT 19 September 2025 shows light
smoke and haze across Idaho moving in from Washington, Montana, and British
Columbia. Smoke production from the wildfires in the Central Mountains and
North Idaho has been dampened by recent weather, but those fires are still
generating light smoke and haze. Models have been picking up on crop residue
burning in Central and North Idaho.
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