Dense Smoke in Lewiston Area, Idaho

Dense Smoke September 12, 2020 – September 19, 2020 · Lewiston Area, Idaho

What the National Weather Service wrote

An air quality sensor in Lewiston recorded unhealthy air quality from September 12th through 19th. It spiked to continuous hazardous conditions on September 12th and 13th. The arrival of a cold front on September 19th brought showers and westerly winds which ventilated the area.

The wider storm

Multiple large wildfires in Washington, Oregon, and surrounding states produced copious quantities of dense smoke throughout the month of September. The smoke from these fires severely degraded air quality across much of northern Idaho in mid-September. Numerous communities in the Idaho Panhandle suffered periods of very unhealthy to hazardous air quality.

Source: NOAA Storm Events Database, event 922095. Narratives are written by the National Weather Service forecast office that issued the report.

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