Tule fog (/ ˈtuːli / TOO-lee) is a thick ground fog that settles in the San Joaquin Valley and Sacramento Valley areas of California 's Central Valley. Tule fog forms from late fall through …

Dec 11, 2025 · The Central Valley is fertile ground for the formation of tule fog, a persistent radiation fog, in late autumn and winter. It occurs when air near the surface, laden with …

Dec 17, 2025 · The gloom that has gripped California’s Central Valley since before Thanksgiving is known as a tule fog, named after a tall native grass that grows in the area’s freshwater …

Dec 16, 2025 · This is the tule fog, and it has trapped the Central Valley in a moist, misty prison for nearly a month. The tule fog has caught a lot of attention over the past few days because …

Dec 17, 2025 · The images show how this persistent tule fog became trapped for weeks, locking in cold temperatures and turning December gray and gloomy for parts of the Golden State.

Dec 24, 2025 · Looking down, a thick still gray blanket of fog stretches across the vast Valley. For days, while the rest of the country boasted clear skies, this middle section of California was …

THE TULE FOG & CLOUDS HAVE RETURNEDLast week's storm delivered a renewed batch of moisture to the area and this weekend's high pressure was all to happy to nose

Dec 1, 2025 · Tule fog is a radiation fog that forms when heat escapes into the atmosphere at night, cooling the air until it reaches the dew point. Moisture then condenses close to the …

Dec 1, 2025 · California’s Central Valley has been enshrouded in mist for more than a week thanks to the area’s infamous tule fog. The image below shows California as seen from space …

Dec 5, 2025 · Each fall and winter in parts of California, a special form of radiation fog can linger for days or weeks at a time, known as tule fog.