At 10:49 p.m. on Wednesday, the National Weather Service released a dense fog advisory in effect until Thursday at 11 a.m. for Foothills of the Northern Blue Mountains of Oregon.

The weather service adds to expect, "Visibilities from one and a half miles to a quarter mile in dense fog."

"Low visibility could make driving conditions hazardous," comments the weather service. "If driving, slow down, use your headlights, and leave plenty of distance ahead of you."

Navigating fog: Safety tips by the weather service

If a dense fog advisory is issued for your area, it means that widespread dense fog has developed and visibility often drops to just a quarter-mile or less. These conditions can make driving challenging, so exercise extreme caution on the road, and if possible, consider delaying

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