This week is going to be a mild, wet one. An atmospheric river that sent a surge of rain into western Washington Monday is now sagging south toward Northwest Oregon. It will then pivot north again Tuesday night and Wednesday.

An atmospheric river is a stream of moisture from tropical or sub-tropical sources transported into mid-latitude storm systems, and produces copious amounts of rainfall with relatively high snow levels. This feature is actually quite common around the globe and helps produce the bulk of mid-latitude annual rainfall, including the Pacific Northwest.

How much rain?

Forecast rainfall amounts through Wednesday are indicative of a soggy atmospheric river. The Cascades will receive the greatest amount of rain, ranging from 6 to 12 inches of rain. The Olympics will also r

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