Atmospheric Rivers Expected to Bring Christmas Storms and Rising Temperatures

Forecasts predict heavy precipitation, high winds, and potential heat anomalies as atmospheric rivers intensify across the U.S.

The National Weather Service forecasts a moderate chance of an atmospheric river impacting up to eight western states from December 25 to 28, including Washington, Oregon, and California.
Heavy rainfall, mountain snow, and high winds could lead to localized flooding, landslides, and travel disruptions during the holiday period.
Atmospheric rivers, in addition to causing heavy precipitation, are linked to extreme heat events and unseasonably warm winters, with temperature anomalies reaching 9–18°F above average.
New research highlights the role of atmospheric rivers in amplifying heatwaves and warming winters, with significant impacts on infrastructure, agriculture, and public health.
Scientists emphasize the need for improved forecasting to better predict both the precipitation and heat-related impacts of these intensifying weather systems.