Long-duration Tule fog event in the Central Valley of California
10-minute GOES-18 daytime True Color RGB and Nighttime Microphysics RGB images, from 1000 UTC on 21 November to 0000 UTC on 20 December [click to play MP4 animation]
The fog was more sparse in its areal coverage during the initial 3 days of the period — but became more persistent and widespread beginning on 24 November. The arrival of increasing dense middle to upper-level cloud cover on 19 December (associated with an atmospheric river) began to obscure the fog across the northern 2/3 of the Central Valley.
