...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON PST SATURDAY... * WHAT...Visibility one quarter mile or less at times in dense fog. * WHERE...In Oregon, Lower Columbia Basin of Oregon, Foothills of the Northern Blue Mountains of Oregon and Foothills of the Southern Blue Mountains of Oregon. In Washington, Lower Columbia Basin of Washington and Foothills of the Blue Mountains of Washington. * WHEN...Until noon PST Saturday. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...Although the visibility has improved this afternoon, dense fog is expected to return this evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. &&