Often on summer days, the heat of the interior of California (Sacramento & San Joaquin Valleys) draws cool air from the Pacific. The only sea-level path is through the Golden Gate, which is often fogged-in. When the marine layer is thicker, the fog also flows over the Coast Range. I shot this video 2 weeks ago while driving to San Francisco. It shows the fog cascading over a 1,000' ridge and the San Andreas Lakes toward San Francisco Bay. The video is a 10x time-lapse to better show the movement. Launch video

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