Oregon DEQ

Air quality in the Salem area has been “unhealthy” or “unhealthy for sensitive groups” since Tuesday night, as the area sits under a ridge of high pressure.

The pollution, primarily smoke, should begin to clear by Thursday afternoon, when winds are predicted to pick up, said Briana Muhlestein, a meteorologist with the National Weather Service.

A frontal system will bring rain Thursday night and Friday, which should further improve air quality, she said.

The Oregon Department of Environmental Quality doesn’t plan to issue an air quality advisory, DEQ spokesman Dylan Darling said. That usually only happens when air quality is projected to be poor for a prolonged period.

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