Happy Tuesday! We're continuing to track valley fog chances, and a dense fog advisory is active until 10 am for the north end ...

A 400-mile stretch of dense Tule fog has blanketed California's Central Valley and stretched into the Bay Area, according to the National Weather Service. The fog - a winter hallmark of the San ...

An atmospheric phenomenon occurring over much of California was unmistakable in satellite imagery in late autumn 2025. Fog stretching some 400 miles (640 kilometers) across the state's Central Valley ...

While California's Central Valley was experiencing a persistent form of "radiation fog" in late 2025, the fog wasn't radioactive. In fact, radiation fog is the most common type of fog in most of the ...

What is the mysterious ‘radiation’ fog blanketing California – and is it dangerous? - The fog pattern is a common one in California’s Central Valley and does not pose any extra risk to human health, r ...

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An end to a lengthy dry spell that has made this December one empty of rain in the Bay Area — but heavy with tule fog more common for the Central Valley — is about at hand, according to the National ...

A massive fog bank that has been blanketing much of California’s Central Valley with low-lying clouds since Thanksgiving time has prompted fears online of a mysterious and harmful “radiation fog,” but ...

If you live in California’s Central Valley, the phrase “tule fog” is something you most likely dread. Tule fog is a dense, ground-hugging fog special to this region that occurs during the late fall ...