出典:Wiktionary
出典:『Wiktionary』 (2025/09/08 02:51 UTC 版)
Named for the tule wetlands of the Central Valley of California in the United States, where it forms.
出典:Wikipedia
出典:『Wikipedia』 (2011/06/30 09:28 UTC 版)
Tule fog (pronounced /ˈtuːliː/) is a thick ground fog that settles in the San Joaquin Valley and Sacramento Valley areas of California's Great Central Valley. Tule fog forms during the late fall and winter (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. Accidents caused by the tule fog are the leading cause of weather-related casualties in California.