Several systems are expected to move through western Washington this week, bringing rain to the lowlands and snow to the mountains.
SEATTLE — Fall is in full swing as western Washington’s weather pattern shifts to cooler and wet conditions. The latest systems could even bring the possibility of snowflakes in the mountains and an atmospheric river in the northern counties.
A system moving in Tuesday night is expected to spread steady rain into the lowlands by Wednesday morning. There’s a slight chance for thunderstorms, especially near King and Snohomish counties, where a convergence zone could form, according to the KING 5 First Alert Weather Team.
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