On Thursday, the National Weather Service issued a dense fog advisory in effect until Friday at 10 a.m. for Central Douglas County, Eastern Curry County, Josephine County, and Jackson County.
The advisory warns of visibility of one quarter mile or less due to dense fog. The National Weather Service notes:
"Low visibility could make driving conditions hazardous."
"If driving, slow down, use your headlights, and leave plenty of distance ahead of you."
A dense fog advisory means widespread dense fog has developed, often reducing visibility to a quarter-mile or less. Such conditions make driving difficult and potentially dangerous.
Exercise caution and consider postponing travel if possible during the advisory period.
Author's summary: Dense fog in Southern Oregon will lower visibility to a quarter-mile, creating hazardous driving conditions and necessitating careful adherence to safety tips until Friday morning.