A series of frontal systems are expected to affect Western Washington this week. According to the National Weather Service, the Jet Stream across the Pacific will direct a series of “vigorous” frontal systems across the region. The first system, expected early Tuesday morning, is forecast to produce locally heavy snow in the mountains above about 3,000 feet. The system expected Tuesday night and Wednesday will cause snow levels to rise to as high as 6,000 feet and produce heavy rain on the Olympic Peninsula with windy conditions. And forecasters are tracking another system that could bring more heavy rain to the lowlands, and heavy snow to the mountains, along with damaging winds on Friday. Flooding is also possible later this week. Although no particular systems appears to have enough precipitation to cause widespread flooding, rivers will rise with some of the more flood prone rivers, like the Skokomish River, may rise above flood stage by the end of the week. At this time, The Skokomish is expected to rise above 15.5 feet early Thursday morning.
As for the specific forecast, the chance of precipitation will be between 80% and 100% through at least Thursday with heavy rain expected Thursday night and Friday.