That's right, KPLU weather expert Cliff Mass says those who live in "these low spots, places where the wind doesn't get into, these hollows" could see temperatures in the 20s early Saturday morning.
For most of western Washington, it'll drop into the mid 30s tonight, says Mass, a professor of Atmospheric Sciences at the University of Washington.
"We have a slug of cold air that's pushed all the way down into California," he says.
It'll begin warming up on Sunday, as a front brings in showers by Sunday evening. And by Monday, he predicts it'll be mostly dry and back up into the 50s.
For the complete forecast, and the story of the loneliest and most threatened weather station in the northwest, click the "listen" button above.
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Do you have a weather question? Cliff Mass and Keith Seinfeld occasionally answer reader questions on the air. Share yours here.
The weekly KPLU feature "Weather with Cliff Mass" airs every Friday at 9 a.m. immediately following BirdNote, and repeats twice on Friday afternoons during All Things Considered. The feature is hosted by KPLU’s Science and Health reporter Keith Seinfeld. Cliff Mass is a University of Washington Professor of Atmospheric Sciences, a renowned Seattle weather prognosticator, and a popular weather blogger. You can also subscribe to a podcast of “Weather with Cliff Mass” shows.