What is an atmospheric river affecting Washington?

An atmospheric river is a long, narrow region in the atmosphere that transports water vapor, causing heavy rain and snow.

Which Washington rivers are forecast to flood?

Eleven rivers, including the Grays, Cowlitz, Nisqually, Puyallup, White, Snoqualmie, and Skykomish rivers, are expected to reach major flood levels.

How much rain is expected from the atmospheric river in Washington?

Some areas in Washington could receive up to 15 inches of rain within a 72-hour period due to the atmospheric river.

Home / Weather / Washington Rivers Brace for Major Flooding Amidst Atmospheric River

Washington Rivers Brace for Major Flooding Amidst Atmospheric River

9 Dec

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Summary

Eleven Washington rivers are expected to reach major flood levels.
Atmospheric rivers can cause heavy snow, rain, strong winds, and landslides.
Some areas in Washington could see up to 15 inches of rain in 72 hours.

Washington Rivers Brace for Major Flooding Amidst Atmospheric River

Washington state is facing a significant threat of major river flooding as an atmospheric river currently saturates the region with heavy rainfall. Eleven rivers across the state have been identified by the National Water Center as likely to reach major flood stages, warning of extensive inundation and potential evacuations.

This intense weather event is characterized by atmospheric rivers, described as "rivers in the sky" that transport large amounts of water vapor. These systems are known for delivering substantial snow, rain, and strong winds, particularly impacting the West Coast during winter months. While they can replenish water resources, they also carry risks of flash floods, mudslides, and power disruptions.