Dense fog
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The National Weather Service issued stagnant air and dense fog advisories for areas of the Willamette Valley that includes Philomath.

The dense fog advisory is in effect until noon Monday for central and southern areas of the Willamette Valley. Visibility of one-quarter mile or less can be expected in areas of dense fog.

The situation could lead to challenging driving conditions.

“If driving, slow down, use your headlights and leave plenty of distance ahead of you,” the NWS advises.

The air stagnation advisory is in effect for the south and central Willamette Valley locations until 4 p.m. Wednesday. The NWS advises that stagnant air is expected in areas below 1,500 feet elevation during this time period.

During the advisory, a period of stagnant air with light winds is expected with conditions possibly resulting in the development and persistence of poor air quality.

“People with respiratory illness should follow their physician’s advice for dealing with high levels of air pollution during periods of stagnant air,” the NWS advises. “State air quality agencies highly recommend that no outdoor burning occur and that residential wood burning devices be limited as much as possible.”

According to state air quality agencies, prolonged periods of stagnant air can hold pollutants close to the ground where people live and breathe. Check with Philomath Fire & Rescue for any possible restrictions.