If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON PST TODAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Oregon, Eastern Columbia River Gorge of Oregon, Lower Columbia Basin of Oregon, Foothills of the Southern Blue Mountains of Oregon and North Central Oregon. In Washington, Eastern Columbia River Gorge of Washington, Kittitas Valley, Yakima Valley, Lower Columbia Basin of Washington and Foothills of the Blue Mountains of Washington. * WHEN...Until noon PST today. * IMPACTS...Hazardous driving conditions due to low visibility.