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, Lower Columbia Basin of Oregon. In Washington, Yakima Valley, Lower Columbia Basin of Washington and Foothills of the Blue Mountains of Washington. * WHEN...Until noon PST Monday. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...Freezing fog may be present in locations where temperatures drop below freezing, which may cause slick roadways and other surfaces.