Dense Fog Advisory issued December 21 at 2:51AM PST until December 21 at 10:00AM PST by NWS Pendleton OR

* WHAT…Visibility one quarter mile or less in dense fog.

* WHERE…In Oregon, Foothills of the Northern Blue Mountains of
Oregon. In Washington, Foothills of the Blue Mountains of
Washington.

* WHEN…Until 10 AM PST this morning.

* IMPACTS…Low visibility could make driving conditions hazardous.