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Napa, north of San Francisco, recorded its worst flood to this time [29] while nearby Calistoga recorded 29 inches (740 mm) of rain in 10 days, creating a once-in-a-thousand-year rainfall event. [27] Records for 24-hour rain events were reported in the Central Valley and in the Sierra. Thousand-year rainfalls were recorded in the Sierras. [1]
However, the series of storms that led to the Great Flood of 1862 averaged precipitation levels that records show only occur once every 500 to 1,000 years. [28] The geographical range of flooding in the state was noted by a traveling geologist from Yale University, William Brewer, who wrote that on January 19, 1862,
Average precipitation across the region show maxima along the coastal plain and along the mountains of the Appalachians. Between 28 inches (710 mm) and 62 inches (1,600 mm) of precipitation falls annually across the area. [60] Seasonally, there are slight changes to precipitation distribution through the year.
The heavy downpour in Santa Barbara County occurred Sunday near Goleta, not far from where a once-in-500-years storm cell hit the denuded hills of Montecito in 2018, triggering a mudslide that ...
The slow-moving atmospheric river that was finally moving out of California on Wednesday unleashed record rainfall, triple-digit winds and hundreds of mudslides. In four days, downtown Los Angeles ...
Tropical cyclones from the eastern Pacific bring nearly 20 percent of the average annual rainfall to southern California. [1] The average storm total rainfall for a tropical cyclone impacting the contiguous United States from the Atlantic basin is about 16 in (410 mm), with 70 to 75 percent of the storm total falling within a 24‑hour period.
The slow-moving atmospheric river still battering California on Tuesday unleashed record rainfall, triple-digit winds and hundreds of mudslides. In just two days, downtown Los Angeles got soaked ...
A deluge of rainfall from what city officials are calling a "thousand-year storm" forced hundreds of rescues, flooded an untold number of homes and businesses and caused millions of dollars in ...