Atmospheric rivers

Atmospheric rivers are long plumes of water vapor in the atmosphere — 250 to 375 miles wide on average — and are often referred to as rivers in the sky.Great Flood of California

The Great Flood of 1862 was the largest flood in the recorded history of Oregon, Nevada, and California, occurring from December 1861 to January 1862. It was preceded by weeks of continuous rains and snows in the very high elevations that began in Oregon in November 1861 and continued into January 1862. This was followed by a record amount of rain from January 9–12, and contributed to a flood that extended from the Columbia River southward in western Oregon, and through California to San Diego, and extended as far inland as Idaho in the Washington Territory, Nevada and Utah in the Utah Territory, and Arizona in the western New Mexico Territory. The event dumped an equivalent of 10 feet of rainfall in California, in the form of rain and snow, over a period of 43 days.[1][2] Immense snowfalls in the mountains of the far western United States caused more flooding in Idaho, Arizona, New Mexico, and Sonora, Mexico the following spring and summer as the snow melted.

Great Flood of 1862

K Street, Inundation of the State Capitol, City of Sacramento, 1862.jpg

Lithograph of K Street in the city of Sacramento, California, during the Great Flood of 1862


December 1861 – January 1862


Oregon, Nevada, California, Idaho, Arizona, Idaho, New Mexico, Sonora, Mexico

The event was capped by a warm intense storm that melted the high snow load. The resulting snow-melt flooded valleys, inundated or swept away towns, mills, dams, flumes, houses, fences, and domestic animals, and ruined fields. It has been described as the worst disaster ever to strike California.

Us Native Americans know that the Sacramento Valley can and will become an inland sea when the rains came. Their storytellers described water filling the valley from the Coast Range to the Sierra.

The entire Sacramento and San Joaquin valleys were inundated. An area about 300 miles (480 km) long, averaging 20 miles (32 km) in width,[18] and covering 5,000 to 6,000 square miles (13,000 to 16,000 km2) was under water.[12] The water flooding the Central Valley reached depths up to 30 feet (9.1 m).

Orville Dam is going to collapse.

The ‘nightmare’ California flood more dangerous than a huge earthquake