Contra Costa County, CA – Drivers across parts of the East Bay faced reduced visibility Monday morning as thick fog settled into interior valleys, prompting travel cautions during the early commute.
According to the National Weather Service San Francisco Bay Area/Monterey, fog developed overnight and persisted into the morning hours across interior East Bay communities, including Walnut Creek, Concord, Antioch, Brentwood, and Byron. The fog was thick enough in some areas to significantly limit visibility on local roads and highways.
The weather service said conditions are expected to gradually improve by mid to late morning, with fog clearing as sunshine increases. By the afternoon, skies are forecast to be mostly sunny, though officials noted that a few passing high clouds could linger later in the day.
The fog primarily affected inland valley locations rather than coastal areas, a common winter weather pattern when cooler overnight temperatures trap moisture near the ground. While no formal dense fog advisory was issued, the NWS urged drivers to use caution if traveling early, especially on Interstate 680, Highway 4, and surface streets in fog-prone zones.
Motorists were advised to slow down, use low-beam headlights, and allow extra stopping distance when driving through fog-covered areas. Visibility can change rapidly, particularly near open fields and low-lying roadways.
No rain or storm systems are expected in the region Monday, and temperatures are forecast to remain seasonable for January across the Bay Area.
Residents who experienced fog-related delays or hazardous conditions are encouraged to share what they saw on the roads.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
Follow us on Instagram & Facebook for more relevant news stories and SUPPORT LOCAL INDEPENDENT NEWS! Have a tip? Message us!
