All Weather News

Poor Air Quality This Weekend in the West

27 Jan 2017, 10:23 am

Poor air quality is expected across portions of the Western U.S. through this weekend. Air Stagnation Advisories continue for many areas in the Northwest. An Air Quality Alert has been issued in Idaho for the Salmon area for degraded air conditions. An Ozone Action Day has been posted for the Upper Green River Basin in Wyoming for high ozone levels.

The Environmental Protection Agency expects air quality conditions to worsen throughout the day with moderate to unhealthy conditions. Colder temperatures have settled across the west, with warmer air aloft occurring. This is called a temperature inversion, which can trap particles in the lower parts of the atmosphere. Limited air movement may cause pollution and respiratory problems as the air particles stay trapped under the inversion.

Persons who suffer from respiratory problems, especially in heavily populated areas, will be most affected by the air quality issues. Residents with these health problems should remain indoors in climate controlled environments during this weather pattern.

Ground fog has also formed in Central California’s San Joaquin Valley and in Southeast Washington, Northeast Oregon, and Western Idaho. Visibility below a .25 mile is possible in these areas. In the Blue Mountain Foothills, temperatures have fallen below freezing. Drizzle and mist associated with the fog could produce a thin glaze of ice on untreated roads and surfaces.

For WeatherNation: Meteorologist Mace Michaels

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