The National Weather Service has issued a flood watch for Thurston County through Thursday afternoon.
A flood watch means there is a potential for flooding. The current flood watch covers much of Western Washington including Grays Harbor, Lewis, Pierce, King and Snohomish counties.
In Mason County, a flood warning — meaning flooding is imminent or occurring — for the Skokomish River near Potlatch is in effect until Friday morning.
The weather service also warned the rainy forecast means an increased threat of landslides.
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Two to 5-1/2 inches of precipitation was expected in the Olympics and Mount Rainier on Tuesday with 1 to 4 inches expected for the Cascades north of Mount Rainier. A second system could hit late Wednesday into Thursday, with the snow level falling to 4,000 feet as the system moves through.