A 400-Mile-Long Layer Of Fog Has Been Draped Over California For 3 Weeks

[usonian]

California's Central Valley is no stranger to the phenomenon known as tule fog, but a blend of perfect conditions has allowed this particular event to last for over three weeks.
Sara Tonks
BySara Tonks•5 days ago



I got lots of photos from above, at 2700 ft. elevation.


SAN JOACHIN VALLEY BELOW!

https://weather.com/news/weather/news/2025-12-16-tule-fog-central-california-valley-november-december

Lots of soil water. Modesto and Hanford broke all records for precipitation from September to November.

In late November, a stable high-pressure system developed over California, helping to trap all of that moisture.

The fog layer has kept things cool in the valley as the rest of the Southwest has been basking in above-average temperatures.

Now we have our temperature inversion.

Is the end coming soon? Until a storm comes in to clear out the moist air, there's no anticipated end to the foggy conditions. The National Weather Service in Hanford, California, is warning of fog at least through Friday of this week.

Storm is on the doorstep. The rain (from the Pineapple Express, latest edition) in the Central Valley and foothills keeps getting pushed forward. It now looks like Wed through Friday (which so happen to be Dec. 24, 25 and 26.) Nice timing.

[CaliforniaPeggy]

1. Thanks for your very informative post, my dear usonian!

The photos really bring home all the gray skies we've been having. And this week--this Christmas week!--it will be raining.

Phooey.

Of course we need the water.