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How Weather Forecasts Can Help Dams Supply More Water

Between Christmas and January this year, a parade of nine atmospheric rivers — vast streams of water vapor flowing east from the tropical Pacific — pummeled California. The trillions of gallons of rain poured on the state caused widespread flooding. While the rain topped up some drought-depleted reservoirs and aquifers and filled out snowpack in the Sierra Nevada, much of the water quickly ran off into the sea, flowing off asphalt and farms or released from reservoirs to prevent further flooding.

New Report Confirms Benefits of Forecast-Informed Reservoir Operations at Lake Mendocino

Modern forecasting methods fueled by advances in understanding and predicting atmospheric river storms have enabled U.S. Army Corps of Engineers operators to better optimize water resources at Lake Mendocino, a Northern California reservoir. A multi-agency report issued Feb. 4, 2021, describes how these forecasting tools have helped operators increase the lake’s dry season stores of drinking water, improve its ability to alleviate flood risk, and enhance environmental conditions in the downstream Russian River to support salmonid species.