By JIM RYAN

The Oregonian | OregonLive

The Portland area could see new snow again Friday.

That's right: The metro area will be under a winter weather advisory from 4 p.m. Friday until 4 a.m. Saturday. The National Weather Service said a dusting of snow is possible Friday afternoon and that more will arrive after 6 p.m.

The Weather Service expects 1 to 2 inches of snow. The agency said drivers should plan on encountering slippery roads.

View a Weather Service infographic detailing the snow event below.

Snow will arrive this evening and will bring some light accumulation on grassy surfaces below 500 to 1000 feet. Above this elevation, accumulations will be higher with some accumulation possible on roads, especially if they are untreated. pic.twitter.com/deUWW652Hu — NWS Portland (@NWSPortland) February 23, 2018

According to the weather service, Friday's low of 24 at Portland International Airport beat the record of 25, set in 1993. In Salem and Eugene, records of 22 and 24, respectively, which have stood in both cities since 1920, were beaten out by lows of 21 and 20.

Astoria also saw a record low of 23 degrees, falling below the previous record of 27 set in 1953. Both McMinnville and Vancouver, at 22, tied previous records set in 1957 and 1993, respectively, according to NWS records.

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Meteorologist Evan Bentley told The Oregonian/OregonLive that snow accumulation in the valley would be limited to grassy areas. And any frost that reaches the roads "shouldn't pose a problem for tonight's commute."

"Once we talk about going into the mountains over the weekend, that's a different story," he said. "There's going to be a ton of snow in the mountains: Two to three feet at the pass level through Sunday night."

Even at elevations of 1,500 to 2,000 feet in places like Zigzag and Welches, Bentley said, travelers can expect between one foot to a foot-and-a-half of snow.

Live with NWS Friday afternoon We're live with the National Weather Service in Portland for the latest update on tonight's snow forecast. Posted by The Oregonian on Friday, February 23, 2018

"It snows a lot in the mountains throughout the year but this will probably be one of the heavier snowfalls they'll have for the entire season," he said.

Bentley suggests anyone traveling through the Cascade or Coast range pack blankets, bottled water and extra food, just in case.

Those mountain passes will also experience 40-50 mph winds, which may cause problems with visibility.

Down in the valley, however, any snow accumulation should be wiped out when it turns to rain between midnight and 3 a.m.

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Photo by Hoodland Fire District

Snowy roads had already caused trouble for one vehicle on the passes. A semi truck slid across the road and crashed after hitting a patch of black ice just southeast of Rhododendron Friday afternoon, officials said.

Another vehicle had also veered off the road and crashed into a tree as well. There were no injuries in either incident, according to a news release.

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Beth Nakamura/Staff

Weekend in Portland

Portland’s Saturday forecast calls for rain and snow showers that become just rain after 10 a.m., the Weather Service says. Forecasters expect little or no snow will accumulate.

It’ll be rainy on Sunday, forecasters say, and rain and snow showers are likely late Sunday night.

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The Oregonian file photo

School closures and delays

View a list of school closures and delayed openings by clicking here. Some school buses are running on snow routes.

The following morning buses will be in snow routes Friday: Skyline 21 and 14, Lincoln 31, Chapman 14 and 13, Bridlemile 205. All schools start at regular times. — Portland Public Sch. (@PPSConnect) February 23, 2018

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550 AM | The Portland Airport has broken its record low temperature for February 23rd with a temperature of 24°F so far this morning. The previous record was 25°F in 1993. #pdxtst #orwx — NWS Portland (@NWSPortland) February 23, 2018

Chilly temperature

It was pretty chilly early Friday in Portland.

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Dave Killen/Staff

Late in the year?

Does it seem late in the year for snow in Portland?

This is nothing, compared to 1961.

The Portland International Airport received a trace of snowfall on April 22 of that year, marking the last snow of the winter season included in records spanning 1940-2014.

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Mark Graves/Staff

Photos of Thursday snow

Take a look back at snow photos from Thursday by clicking here.

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Mark Graves/Staff

More weather information

More weather information

You can find up-to-date weather information by visiting the National Weather Service's website. The agency is also active on Facebook and Twitter.

The Oregonian/OregonLive will continue to post updates to this page and elsewhere on OregonLive.com. Follow our social media pages for photos and more.

— Jim Ryan

jryan@oregonian.com

503-221-8005; @Jimryan015