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Mostly Cloudy And Dry Labor Day Weekend After Rain Moves Through On Friday

Elaine Thompson
AP Photo
Mount Rainier is illuminated at dawn beneath a brilliant cover of clouds as seen from Seattle, about 50 miles away, Wednesday, Sept. 21, 2011.

A line of convection brought rain into greater Seattle Friday morning, but knkx weather expert Cliff Mass says that should be the worst of it over the long holiday weekend for most places around Puget Sound.

“We’ll see just showers most of the day, except in northern Puget Sound,” Mass said, noting that he expects a Puget Sound convergence zone to form late in the day, bringing some heavier showers from North Seattle up to Everett.

But he says the weather should follow an improving trend over the weekend as an upper level-trough of low pressure moves through and out of the region.  So if you have outdoor plans for Labor Day, you should be fine by Sunday.

Drier Saturday; Some Sun

On Saturday morning, expect mostly cloudy conditions and a perhaps a few lingering showers, Mass said.

“But as we go later in the day on Saturday, you should see an improvement, maybe even a bit of sun,” he said.  He predicts temperatures will get into the upper 60s, “so not that warm.”

But he says the greatest chance of showers on Saturday will be in the mountains, especially on the western side of the Cascades. Most people will be able to stay dry.  

'Not Bad At All' On Sunday And Monday

Mass says Sunday should be a much better day.

“The trough will be through. Maybe some clouds in the morning, but I expect a partly cloudy day, perhaps a few showers in the mountains, but not much more, temperatures in the upper 60s,” he said.

And Monday looks like a similar day. “Temperatures getting up to near 70, partly cloudy, not bad at all,” Mass said.

So Friday should be the wettest day of the weekend and the only day with significant rain. “Once we get through that, the heavy stuff will be over and we should see an improving trend through the weekend,” said Mass.    

To hear the forecast along with a discussion of how knkx has special meaning for most meteorologists and also why hurricanes are hitting Hawaii this week, you can click on the “play” icon at the top of this post.

The weekly knkx feature ‘Weather with Cliff Mass’ airs every Friday at 9 a.m. immediately following ‘BirdNote’, and twice on Friday afternoons during ‘All Things Considered’. The feature is hosted by knkx environment reporter Bellamy Pailthorp. 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.

Bellamy Pailthorp covers the environment for KNKX with an emphasis on climate justice, human health and food sovereignty. She enjoys reporting about how we will power our future while maintaining healthy cultures and livable cities. Story tips can be sent to