page_title: Tule fog
hierarchical_section_title: Tule fog
caption_attribution_description: English: San Joaquin Valley Tule Fog in an unincorporated part of the San Joaquin Valley. Located near Oakdale, Stanislaus County, California.
context_page_description: Tule fog 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 early spring after the first significant rainfall. The official time frame for tule fog to form is from November 1 to March 31. This phenomenon is named after the tule grass wetlands of the Central Valley. Tule fog is the leading cause of weather-related accidents in California.
context_section_description: Tule fog (/ˈtuːliː/) 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 early spring (California's rainy season) after the first significant rainfall. The official time frame for tule fog to form is from November 1 to March 31. This phenomenon is named after the tule grass wetlands (tulares) of the Central Valley. Tule fog is the leading cause of weather-related accidents in California.
caption: Tule fog settled on an orchard in Stanislaus County in late December.
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