Air quality is forecast to be in the GOOD to UNHEALTHY FOR SENSITIVE GROUPS range across the state, though portions of the Treasure Valley may experience periods of UNHEALTHY overnight.
There are not many changes from yesterday's forecast. Oregon's fires are the main smoke contributors affecting South and Central Idaho while fires in Washington and British Columbia are impacting North and Central Idaho. Afternoon winds will help clear some of the smoke across the state but lingering smoke at nightfall will be trapped by inversions in valleys and low-lying areas. This trapped smoke will raise air quality index values overnight.
NOAA GOES-West GeoColor
(true color) visible satellite image captured at 9:46 a.m. MDT on July 22, 2026 shows clouds through
the region. Areas of smoke are visible over Washington, Central Oregon, and
portions of Idaho.
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