KNKX: Weather with Cliff Mass-logo

KNKX: Weather with Cliff Mass


Weather with Cliff Mass is hosted by KNKX's environment reporter, Bellamy Pailthorp featuring University of Washington Professor of Atmospheric Sciences and renowned Seattle weather prognosticator/personality Cliff Mass. Stay up-to-date with the latest weather and more with KNKX!

Weather with Cliff Mass is hosted by KNKX's environment reporter, Bellamy Pailthorp featuring University of Washington Professor of Atmospheric Sciences and renowned Seattle weather prognosticator/personality Cliff Mass. Stay up-to-date with the latest weather and more with KNKX!
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Tacoma, WA


Weather with Cliff Mass is hosted by KNKX's environment reporter, Bellamy Pailthorp featuring University of Washington Professor of Atmospheric Sciences and renowned Seattle weather prognosticator/personality Cliff Mass. Stay up-to-date with the latest weather and more with KNKX!






12180 Park Ave S. Tacoma, WA 98447 253-535-7758


Get Ready For More Rain As Huge Atmospheric River Is Set To Hit Puget Sound Region, Again

Stormy weather that took out power for tens of thousands of residents in the Pacific Northwest this week made national headlines as The W ashington Post commented on the fascinating “river in the sky” that has been dumping rain on the region.

Duration: 00:06:02

Sunshine Will Break Through Northwest Clouds For At Least One Day This Weekend

If the cool and cloudy weather that’s been dominating in the Puget Sound region this week has got you down, hang in there. KNKX weather expert Cliff Mass says the weekend forecast is “improving” and there will be a fair amount of sun poking through, especially on Sunday.

Duration: 00:06:13

Morning Temps Dropping As Showery Fall Weather Takes Hold In Western Washington

An abundance of crisp blue skies have ushered in a relatively dry start to fall this year in the Pacific Northwest, providing a stunning backdrop as the leaves begin to turn. Some sunnier afternoons allowed folks to keep wearing their shorts and sandals. But KNKX weather expert Cliff Mass says there are some sure signs of autumn.

Duration: 00:05:52

Mini Heat Wave Ends, Western Washington Suddenly Transitions To Cool Fall

Seattle saw the mercury hit 86 degrees on Thursday, breaking another daily heat record as people all over the Puget Sound region donned their shorts and sandals and experienced one last taste of summer-like weather.

Duration: 00:05:43

Fall Begins After Driest And Warmest Summer Ever Recorded At Sea-Tac

Residents of the greater Puget Sound region have already been feeling the transition to fall with a shift down to lower temps and more clouds last week. But Friday marks the official end of summer, with the autumnal equinox on the calendar.

Duration: 00:05:30

Dry Spell Coming To An End As Rain And Cool Temperatures Return

Fall doesn't technically start until Sept. 21, but it's arriving early this year as a front moves into the region this weekend. KNKX weather expert Cliff mass says it'll bring cooler temperatures and rain. "We've had this run of dry weather that extended out for months. Temperatures have been above normal. We've even had smoke and ash," Mass said. "But everything's going to change this weekend." Temperatures will plummet on Sunday with highs only in the low 60s. It'll look about the same...

Duration: 00:05:41

Worst Of Smoke Is Over As Cooler Air Moves In To Western Washington

The eerie tinge to the air that deposited showers of ash in many areas of the Puget Sound region Tuesday seems to be subsiding. KNKX weather expert Cliff Mass says the worst of the smoky skies is over, pushed out by the approach of an upper level trough and cooler air moving in from the ocean.

Duration: 00:05:45

Northwest’s Record Hot Summer Continues Into Labor Day Weekend

It’s been a hot summer in the Pacific Northwest, and this Labor Day weekend won’t change that trend at all. “It's going to be warm and dry,” says KNKX weather expert Cliff Mass, who teaches atmospheric sciences at the University of Washington.

Duration: 00:05:16

Nothing But Sunshine In The Forecast – And Likely A Record-Breaking Dry Summer

Lots of sunshine and warmer temperatures are in the forecast all over the Puget Sound region. Once again, the mantra is “no rain.” And if you’ve been feeling like this has been a very dry summer – you’re right. KNKX weather expert Cliff Mass says he’s sure we’ll at least tie the record for the driest summer in Seattle history, going all the way back to 1914.

Duration: 00:05:44

Great Weather For Monday’s Eclipse And The Northwest Is The Place To See It

Cloudy weather and milder temperatures have come back to the Puget Sound region recently. We’ll have partly cloudy skies, no rain and temperatures in the mid-70s this weekend. But come Monday, skies will clear over most of the region, just in time for the total eclipse.

Duration: 00:05:41

Seattle’s Dry Smoky Spell Ending This Weekend As Temps Drop And Rain Rolls In

Seattle's weather is about to revert to its more normal, pleasantly mild and occasionally moist summer pattern. Rain in the weekend forecast should wash out the gritty smoke from British Columbia's wildfires that has plagued the region for more than a week now. The precipitation will also put an end to the long dry spell the city has been experienced.

Duration: 00:06:00

‘SmokeZilla’ Starting To Slowly Ease As Seattle Continues Toward Record Dry Spell

Seattle’s above-normal temperatures have been tempered somewhat by a grimy layer of smoke from British Columbia’s wildfires that moved in Tuesday. The influx has made air quality in and around the Emerald City worse than Beijing’s. Even as the air cools a bit over the weekend, the temperatures will stay far above normal, with the haze dissipating only somewhat and quite slowly, says KNKX weather expert Cliff Mass, a professor of Atmospheric Sciences at the University of Washington. “Last...

Duration: 00:05:32

No Sea-Tac Record For Rain-Free July, But Still Up For Dry Day Streak

A small storm of drizzle spoiled Seattle’s chances to break what KNKX weather expert Cliff Mass viewed as a significant record. Thursday morning’s precipitation was just enough to be considered a "trace" of rain and cancel the chance for a rain-free July. But there is still a chance to continue a dry-day streak.

Duration: 00:07:12

Lots Of Clouds, But Forecast Is Warm And Dry – Will Seattle Break Its Dry-Day Record?

Drizzle and light showers fell in a few places this week, especially in the south end of the Puget Sound region. But for most of the region, including Seattle, rain has been missing for more than a month. KNKX weather expert Cliff Mass says there’s a good chance the emerald city will break a record with this dry spell.

Duration: 00:05:44

'Best Summer' Continues For Western Washington This Weekend

There will be plenty of sunshine and opportunities for enjoying the outdoors this weekend, especially in and around Seattle. KNKX weather expert Cliff Mass says the city "is known to have the best summer in the United States." We'll have highs in the upper 70s for Friday and Saturday for the whole region, with no precipitation and hardly any clouds.

Duration: 00:05:30

Mostly Sunny Weekend Ahead, Warm & Hazy With No Rain To Clean Air After Fireworks

If you have been enjoying the warm sunny skies of Seattle lately, you’re not alone. So many of us revel in the long stretches of dry weather that are so favorable for outdoor activities. This weekend will offer more of that wonderful weather, with just a few morning clouds that should burn off in the afternoons.

Duration: 00:06:40

Classic Blue Skies In Seattle For July 4th; Just A Few Clouds This Weekend

“The bluest skies you’ve ever seen are in Seattle” — so goes the corny Perry Como TV tune from the late '60s. But it’s still true nearly 50 years on. The weekend forecast includes more of that great weather – only sullied by a few clouds coming in from the ocean over the weekend. And the blue skies will be back in time for July 4 th festivities. He says Friday’s weather will be “perfect – sunny, absolutely dry, highs in the lower 80s. So, it’s going to be the warmest day of the weekend –...

Duration: 00:05:00

June Gloom Is Gone: Expect Temps Around 90 In The Puget Sound Region; Coastal Heat Too

If you like heat, this is the weekend for you in the Pacific Northwest. Just in time for the official start of summer, temperatures are about to zoom all the way up to near 90 degrees. “And I think some people will see record temperatures this weekend,” said KNKX weather expert Cliff Mass, who was quick to clarify that these would only be for a single day in question, which are "not such a big deal. “ He says the perfect weather people will see Friday won’t really last. It’s cool, clear...

Duration: 00:06:45

Typical NW ‘Juneuary’: Partly Cloudy, With A Warm And Wet Father’s Day Morning Ahead

Do you know the term "Juneuary"? That’s what many people living in the Pacific Northwest call this time of year because of a combination of factors that make the month of June less than spring-like. There’s the typical low cloud cover, shared with the rest of the coast all the way into Northern California and often referred to as "June Gloom." And then there are periods of heavy rain that sometimes hit unexpectedly. That’s what happened on Thursday, when an atmospheric river hit the coast....

Duration: 00:06:37

Typical ‘Juneuary’ Weather In The Northwest: Mixed Bag Of Sunny And Cloudy In Forecast

Keep those layers handy and also a rain poncho or parka if you’re doing anything outdoors this weekend. It’s typical June weather in the Northwest, which had a nice stretch of beautiful weather lately, but has now entered a period of mixed weather that some people like to call "Juneuary." The temperatures have dropped and there are lots of clouds around. KNKX weather expert Cliff Mass says this is typical for the time of year we’re in. Friday: Mixed And Cool There was an area of convection...

Duration: 00:06:01

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