Dense Fog Advisory In Effect Until 10AM Christmas Eve

WHAT…Dense fog with visibility of a quarter mile or less.
WHERE…In California, portions of the Shasta, Scott, and Lower Klamath River Valley. In Oregon, portions of the Rogue, Illinois, and Umpqua Valleys.
WHEN…Until 10 AM Saturday.
IMPACTS…Hazardous driving conditions due to low visibility.
ADDITIONAL DETAILS…The fog is just starting to become dense and is expected to expand overnight. As of 9:10 PM it is most dense between Medford & Central Point, and heading SW out of Grants Pass along route 199. For other areas like the Shasta Valley and Umpqua Valley, the fog is more impactful as you go up in elevation along I-5. An incoming front may lift the fog before 10 AM; NWS will continue to monitor for necessary updates.
Slow down and allow for plenty of room between you and other vehicles.
Fog makes objects appear farther away than they are
Use low beams. High beams reflect back thick fog, making visibility worse for you and other drivers.
Be prepared. Keep your headlights clean. That way, you’re ready for low-visibility conditions
Don’t use cruise control. Most crashes occur because the driver is going too fast for weather conditions.