Preliminary measurements estimate the flow was 16100 cubic feet per second, exceeding the previous record flow of 14,500 cubic feet per second set on December 2, 1962. Residual snow pack and warm temperatures will continue to cause serious urban flooding in Wenatchee in Chelan County. Rainfall for the 24 hours ending 7pm local time Wednesday was very heavy over both the Napa and Russian River Basins. 6 to 8 inches were common with higher amounts over the mountains. The Napa River had crested for the time being at up to 4.5 feet above flood stage, resulting in major flooding in the lower Napa Valley with flood damage to homes and businesses.
Many roads are underwater making transportation nearly impossible.
Disastrous flooding was expected with many homes and businesses flooded along the lower Russian River and transportation impossible. Heavy rain across northeastern California Wednesday caused rapid rises on the Susan River, with flooding near and below Susanville. Some evacuations occurred near Susanville. The Merced River was over 2 feet above the 9 foot flood stage and Yosemite Park rangers reported that Yosemite Park was closed and all park roads were impassible. Rain will continue, adding to the flooding problems.