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In San Francisco, there were 35 inches of precipitation in December 1861–January 1862, and almost 50 for the season. [16] There were four distinct rainy periods: The first occurred on December 9, 1861, the second on December 23–28, the third on January 9–12, and the fourth on January 15–17.
In the Great Flood of 1862, San Francisco receives 24.49 inches (622.0 mm) of rainfall for January, its highest monthly rainfall on record, and the “rain year” total from July 1861 to June of 49.27 inches (1,251.5 mm) is also the highest ever. [1]
Early in 1862, extreme storms riding the Pineapple Express [4] [5] battered the west coast for 45 days. In addition to a sudden snow melt, some places received an estimated 8.5 feet (2,600 mm) of rain, [5] leading to the worst flooding in recorded history of California, Oregon, and Nevada, known as the Great Flood of 1862. Both the Sacramento ...
1862 Flood >5,000 $100 million (1862 USD); $262.2 billion (2020 USD) Great Flood of 1862: California, Oregon, Utah, and the territories that now make up Arizona and Nevada: An atmospheric river led to 43 continuous days of rain, lasting from December 1861 until January 1862.
From February 15 to the end of March 1904 occurred the most destructive flood as far as property was concerned in the recorded history of Sacramento. The greatest known flood occurred forty-odd years before, In January, 1862 and was due to rainfall, the precipitation in December, 1861 and January, 1962 just prior to it having been 23.62 inches.
A USGS model image shows the enormous atmospheric river that may have been present during the 1861–1862 flood event.. The ARkStorm (for Atmospheric River 1,000) is a hypothetical megastorm, whose proposal is based on repeated historical occurrences of atmospheric rivers and other major rain events first developed and published by the Multi-Hazards Demonstration Project (MHDP) of the United ...
1862 Great Flood of 1862: Flood Western United States: $100,000,000 (1862) 3,389 ... Average rainfall over area of 60 mi 2 measured at 10-15 inches (380 mm), ...
Most consecutive days with measurable rain a day with at least 0.01 inches (0.25 mm) of rainfall: 331 days in Oahu, Hawaii, 1939–1940 [303] Snow.