Cliff Mass

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Trick-or-treaters can look forward to less-than-ghoulish weather for this evening's candy harvest. KPLU weather expert Cliff Mass said Friday's rainy Pacific front should clear off to the east by the time the ghosts and goblins hit the streets.

(Does anyone dress up as ghosts or goblins anymore? Perhaps I should say "Marvel heroes," or "Provocatively-dressed pop culture figures." -ed.)

"It may not be as scary tonight as some people feared," said Mass, Professor of atmospheric sciences at the University of Washington. "Maybe there will be a few showers, but it will be mainly dry, so not too bad. And temperatures getting up into the upper 50s today [Friday]."

Jean-Pierre Chamberland

Well, it's complicated.

The forecast for our long holiday weekend starts wet, then dries out, then gets downright motley as we move into prime barbecue territory.

Fred Espenak / NASA Goddard Space Flight Center

The Puget Sound region won’t be the best place to take in the lunar eclipse in the wee hours of Tuesday morning. High clouds are likely to obscure the so-called “blood moon,” which flushes reddish in the shadow of the Earth.

University of Washington atmospheric scientist Cliff Mass says the northwest Washington coast might fare better. And cloud breaks might give even Seattle-area moon-gazers a glimpse — if they keep looking.  

Matthew Rutledge / Flickr

Labor Day marks summer’s unofficial finale, and KPLU weather expert Cliff Mass says the warm weather with make a curtain call this weekend, though the beach-and-barbecue weather will be a memory by Monday.

"Today is the transitional day,” says Mass, a professor of atmospheric sciences at the University of Washington.

Justin Steyer

May 6 isn’t known for much. Perhaps it languishes in the shadow of its older sibling, Cinco de Mayo.

But at least this year, May 6 saw something special when the mercury climbed to a record-breaking high of 87 degrees at Sea-Tac Airport around 5 p.m., crushing the past record high of 79 set in 1957.

Those late November storms are a tradition in the northwest. But after some Friday rain, the trend is drying out, says KPLU weather expert Cliff Mass, a professor of Atmospheric Science at the University of Washington.

In this week's weather talk, Mass explains why late November gets more inches of rain than any other period of the year. Hint: It has to do with the jet-stream, heading at us from Asia. After November, that "atmospheric hose" is pointed farther south in Oregon and northernmost California.

For the complete explanation, click the "listen" button above.

Cliff Mass

Spring arrives next week, but this week still looks like winter in Washington.

The National Weather Service says a front moving through the state Monday is bringing strong winds and rain to Western Washington, heavy snow to the Cascades and snow in much of north central and northeast Washington.

High winds knocked out power for tens of thousands of people in northwest Oregon and western Washington on Monday.

More than 250,000 people are without power and all modes of transportation are still a mess, but “this snow/sleet/freezing rain event is basically done,” reports KPLU weather expert Cliff Mass.

However, Mass said on his weather blog, “Now I hate to bring this up ... but the forecast models for the next week indicate some intense weather in store for us. Heavy rains, strong windstorms.”

The Associated Press

The big melt continues all day and through the evening, as temperatures settle into the 40's.

KPLU and UW weather expert Cliff Mass says "it should feel quite warm" and generally stay above freezing for the next few days.

Given what's already on the ground – and with heavy rains tonight – it's a recipe for a mess.

National Weather Service, 7-15-11

Grouchy Northwesterners are starting to call this 'The year of no summer.' While we may be secretly glad to miss the heat wave that’s punishing the Midwest, we're wondering why we’re stuck with clouds … and when will it end?

When I talked to experts, the first thing they told me: It is no coincidence.

Erin Hennessey / KPLU

With the first day of summer this week, it’s finally beginning to look like it outside. If you think that’s a good sign for the rest of the season, think again. There really isn’t a good way to tell how summer will turn out.

Seattle Office for Education

Seattle Public Schools will get to keep using a controversial math textbook. An appeals court struck down a challenge to the "Discovering" math curriculum by a group of parents and local residents who call it “mathematically unsound.”

WSDOT

The brunt of an arctic cold front is expected to hit Western Washington this afternoon, bringing wind and 2 to 6 inches of snow.  National Weather Service meteorologist Art Gable says temperatures "will drop below freezing and remain below into Thursday morning." A winter storm warning remains in effect through 10 a.m. Thursday.

KOMOcommunities video

Several inches of snow are on the way to Puget Sound's lowlands. Exactly which areas will get the greatest accumulation is something forecasters say is tough to predict, but a number of sources say their models show anywhere from two to six inches in the Seattle area, and up to eight inches or more in Snohomish County and northward.

Gary Davis / KPLU News

You might have wondered -- as you gazed out your sunny window and listened to news of record cold and snow sweeping the midwest and East coast -- is there a connection?

Yes, there is.

"Our weather often is the just the opposite of what it is in the eastern part of the united states," says Cliff Mass, professor of Atmospheric Sciences at the University of Washington. 

"When we are cold, like it was just before Thanksgiving, they tend to be warm," says Mass.

The reason we're yin when they're yang, and vice versa, has to do with the jet stream and "ridges" of high and low pressure in the sky, as Mass explains it.