On the eastern slope of the Sierra Nevada, Lake Tahoe received the most precipitation in 117 years of record-keeping, contributing to the fastest water level rise in the lake's history. Increased outflow from Lake Tahoe contributed to flooding along the Truckee River through Truckee and Reno, Nevada. Lake Tahoe and most of the Truckee reservoirs were filled by mid-July, a level not seen since 1997.
