A dense fog advisory was issued by the NWS Hanford CA on Monday at 9:47 a.m. Visibility one quarter mile or less in dense fog for Hanford - Corcoran - Lemoore until noon today. "Low visibility could make driving conditions hazardous," states the NWS. "If driving, slow down, use your headlights, and leave plenty of distance ahead of you."

The advisory was for Foothills of the Northern Blue Mountains of Oregon, Foothills of the Southern Blue Mountains of Oregon and North Central Oregon.

A dense fog advisory is issued by your local National Weather Service office when widespread dense fog develops. When this happens, visibilities frequ