Heavy rain has put much of Western Washington, including Thurston, Mason and Lewis counties, under a flood watch, according to the National Weather Service.
Rain is forecast to stall over the region for 24 to 48 hours, beginning tonight. Rainfall will be heaviest along the coast and over the mountains, according to the weather service.
Freezing levels are expected to rise dramatically to 7,000 to 9,000 feet, which raises the threat of flooding on some rivers.
The Skokomish River in Mason County is the river most likely to flood, possibly by late Wednesday, according to the weather service.