Data shows that water levels at California’s two biggest reservoirs continue to rise, and both lakes could see another increase next week after at least three atmospheric rivers hit the Pacific Northwest before Christmas. … Though these moisture-laden storms can help alleviate drought, they also pose life-threatening risks with mudslides and floods. In early 2023, back-to-back atmospheric rivers helped California recover from a years-long drought. … As of Tuesday afternoon, the water level at Lake Shasta, California’s biggest reservoir, was at 1,003.63 feet elevation. The lake has risen 6 feet since the start of December and is now 63.37 feet below full capacity. 

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• NSF National Center for Atmospheric Research: Changes in store for atmospheric rivers
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• KOLO News Now (Reno, Nev.): Local snow water amounts showing above normal for mid-December