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!
More Information


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


Big Pacific Northwest Warmup Coming Just In Time For Father's Day, Solstice Celebrations

Last week brought heavy rain showers with cooler temps and even some snow to the mountains in places. But that’s changing as high pressure builds over the region, allowing a big warmup just in time for summer solstice celebrations this weekend and Father’s Day on Sunday.


Rain Returning To Parched Pacific Northwest After Very Dry May

This May, people living in the Puget Sound region experienced a lot of warmth and a month so dry, it matched the record for the driest May on record. The dry spell actually began in mid-April, so it lasted about 6 weeks. That was changing Friday as clouds rolled in and skies began to darken. KNKX weather expert Cliff Mass says folks here had better keep their rain gear in reach.


Windy With A Bit Of June Gloom Before Warmth Returns To Western Wash. Next Week

Cooler temps, clouds and wind gusts ushered out the record warmth Seattle area residents experienced in May, which also tied a record for lack of rain. All that changed on Friday as marine air surged in and cooled things off.


Sunny Monday And Partly Cloudy Northwest Skies This Memorial Day Weekend

The mix of sun and clouds in the Memorial Day weekend forecast should not come as a surprise to people living in the greater Puget Sound region. Late May weather here often brings a tantalizing mix of sunny warmth with clouds that can quickly yield to cooler skies as drizzle or cool marine air pushes in. But the weekend forecast should be mostly drizzle-free, says KNKX weather expert Cliff Mass.


Mild Springtime Weather With Intense But Not Unusual Flooding In The Region

A rapid melt of mountain snowpack in eastern and central Washington is pushing some rivers to high levels not seen in decades. It’s not that unusual, says KNKX weather expert Cliff Mass, who expects the mild weather nearer to the coast to continue through this weekend.


A Sunny Weekend, Zooming To 80 Degrees, But Don’t Call It Global Warming

People in the Pacific Northwest have been experiencing a bit of a roller coaster ride weather-wise lately, with temperatures spiking up and down in a manner that KNKX weather expert Cliff Mass says is quite typical for late May. The ride will go uphill this weekend to a predicted high of about 80 degrees on Sunday, just in time for Mother’s Day. “The weekend is going to be wonderful,” Mass says. The clouds will dissipate later in the afternoon Friday, he says, as temperatures climb to the...


Get Ready For ‘May Gray’ and ‘June Gloom’

Here are some upsides to cloudy weather: Cloud cover creates a soft light that's great for photographers. It’s harder to get a sun burn. And clouds can be really fun to look at. Many of us may need a few reminders that clouds aren't so bad as we enter what could become an extended period in which low clouds and cooler temps dominate in the greater Puget Sound area.


Bye-Bye Sunshine: Marine Push Causes Showers, 20-Degree Drop In Temps

Folks around the Puget Sound region enjoyed a toasty week with temperatures in the 70s starting Tuesday. They even hit the low- to mid-80s in many places in western Washington. But the classic northwest “sandals-and-socks” people are now wearing their socks again.


After Record Rain, Real Spring Warmth Is On Its Way To Western Washington

After nearly three weeks of wet weather that was making it look like this month might shape up to be one of the rainiest Aprils on record, sunshine is on its way to the Pacific Northwest. KNKX weather expert Cliff Mass says there’s one last rainy stretch to get through late Friday, but after that, real spring warmth and strong sun is on the way. “You’re going to need gallons of sun screen,” said Mass of the weather in the week ahead, “so… be ready.”


Feel Like It’s Colder And Wetter Than Normal This Spring? You’re Right

If you were hoping April showers would hold off this weekend, don’t hold your breath. Be ready for more of the cool, wet weather that has been persisting in the Pacific Northwest in recent weeks.


Weakening La Niña Likely Means Stormy Northwest Weather Next Winter

‘April showers bring May flowers,’ or so the saying goes. Like Groundhog Day or dozens of sayings you can find cataloged in a Farmer’s Almanac , it’s part of the weather-related folklore that’s been passed down for generations. They hold some truth. But most meteorologists prefer more scientific observations. For long-term forecasting, the ENSO - or " El Niño Southern Oscillation " - provides some of the most reliable guidance on what kind of weather to expect in winter.


Classic Northwest Spring: Cloudy Skies And Mostly Dry Again This Weekend

A predominantly cloudy period has dominated in the greater Puget Sound region this past week, with intermittent showers and mostly mild temperatures. That pattern is expected to continue into next week, says KNKX weather expert Cliff Mass – with one exception.


Normal NW Spring Weekend Ahead: Rainy And Cold With Possible Thundershowers And Hail

When you think of spring, visions of daffodils and cherry blossoms under warm, sunny skies may come to mind. Turns out the more typical aspects of this season, meteorologically speaking, come from the unstable atmosphere, which produces lots of wet and showery, cool weather.


Springlike Weather This Weekend With Mild Temps And A Few Sprinkles

The vernal equinox marks the official start of spring. That starts Tuesday. But for most folks in the Pacific Northwest, it feels like spring has already arrived.


Heat Wave Hitting Western Washington This Weekend Will Drive Temps Into High 60s

Time to get out the short sleeves and sunscreen. Warms winds from the south and east are going to push the mercury to nearly summer-like levels in western Washington this weekend, says KNKX weather expert Cliff Mass.


Classic Northwest Weekend Ahead: Partly Cloudy With A Chance Of Rain

The record cold, wet and snowy weather of late February has subsided. Residents of western Washington can look forward to a classic Northwest weekend, with mild temperatures, partly cloudy skies and just a chance of rain. “It’s going to be a fairly dry weekend,” said KNKX weather expert Cliff Mass, a professor of atmospheric sciences at the University of Washington.


More Snow, Cold And Rain As Western Wash. Continues To Log Record Low Temps

Don’t put away your hat and gloves. It’s going to stay cold for the next week or so and there will be snow on Friday. That much is certain, says KNKX weather expert Cliff Mass. The rest of the weekend forecast is tricky.


Below Freezing Temperatures Could Mean Snow Showers In Parts Of Western Washington This Weekend

Bundle up and get ready for possible lowland snow in places. KNKX weather expert Cliff Mass says cool air moving in to western Washington will push temperatures below freezing in many lowland areas this weekend, with a chance of snow most likely on Sunday.


Heavy Rain, Flooding This Weekend As Unusual Atmospheric River Hits Western Wash.

Unusually heavy rain and flooding are in the weekend forecast, with the worst hitting Sunday as an atypical atmospheric river sets up from due west and aims its warm plume at western Washington. KNKX weather expert Cliff Mass says that phenomenon means the rain total by the end of this weekend could be 5-10 inches over the lower slopes of the central Cascade Mountains.


Wet And Windy This Weekend As Pacific Cyclone Approaches The Northwest

Batten down the hatches and keep your rain gear handy. A Pacific cyclone is headed toward Vancouver Island, British Columbia. While the highest winds will likely hit north of the Canadian border, KNKX weather expert Cliff Mass says people in western Washington will notice it too, especially toward the coast.