ACTIVE WEATHER CONTINUES through the week as a potent atmospheric river is still on track to impact western Washington.
From Monday through Thursday, we expect an average of 2 - 5 inches of rain to fall in the lowlands of Western Washington, with the higher of these amounts mainly south of Puget Sound.
This much rain will likely cause some urban flooding through Wednesday and in the mountain the risk of landslides will rise next week as well. Total rainfall in the Olympics and Cascade could exceed 10” by the end of the week.
As the rain intensity picks up on Monday morning, we will also experience windy weather throughout the day. More trees could fall as soils become saturated on Monday and Tuesday.
If you live in an area where flooding has occurred in the past, you will likely see some of the same conditions this coming week. As the week progresses, we will likely observe more rain from Seattle southward and less rain to the north of Everett. But it’s important to point out that all of western Washington will be impacted from heavy rain this week.
Snow levels near or above 5,000 feet means snow will fall only on the higher slopes and volcanoes.
A significant amount of rain is expected for our mountains starting Monday and lasting through Wednesday. Rainfall totals over 6 inches will be common with isolated totals over 10 inches across the south Cascades. The run-off of excessive rain will eventually lead to river flooding and it looks like that threat will be greatest on Tuesday, Wednesday and Thursday.
Rivers such as the Snoqualmie, Puyallup, and Cowlitz will likely be pushed to major flood stage with moderate flooding likely on many other rivers such as: Skagit, Skykomish, Snohomish, Skokomish, Chehalis, Nisqually, Newaukum. Again, if you live along a river or in area that has flooded in the past you should be prepared for similar conditions this coming week.
Rain could continue into late week with more showers over the weekend. This will exacerbate the flood threat as we track these multiple weather systems moving in from the Pacific.
There will be adjustments to the weather forecast every day this week. Stay informed with the latest information on KIRO7.
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