The National Weather Service says their forecast models have become somewhat more uncertain but heavy rain is still expected this week. Forecasters still say a series of “vigorous” systems will move through Western Washington through Friday night. The first system is currently moving through the area bringing windy conditions to the coast and snow to the mountains above about 3,000 feet. Conditions are expected to improve behind the front. A second wetter system will move onshore tonight. This system will bring another round of windy conditions and snow levels will rise. Heavy rainfall amounts are expected on the Olympic Peninsula and along the west slopes of the Cascades overnight. A third system will bring more rain to the area Wednesday night into Thursday. Snow levels should remain above the mountain passes. This system may bring another round of windy conditions. Another system will move through the area on Friday. The forecast model shows this system may be weaker but still wet and windy conditions are expected. The Weather Service says the chance of rain this week is 90% to 100%.
While no particular system appears to have enough moisture to cause widespread flooding, rivers will rise. Some of the more flood prone rivers, like the Skokomish, may rise above flood stage by the end of the week. The specific forecast for the Skokomish River has it reaching the 15.5-foot action stage early Friday morning.