Dry, cool air is expected to flow into the region from Canada this weekend.

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Above-freezing temperatures Friday will erase any chance of snow across the Puget Sound region, according to the National Weather Service. But there’s a chance of light snowfall at higher elevations on Christmas Eve.

“It’s really hard to pin down just how this is going to go,” said weather-service meteorologist Dustin Guy. “It’s a borderline situation.”

Some areas north of Seattle, including Whidbey Island and Port Townsend, saw light snow flurries Friday morning mixed with rain, Guy said. But even there, the snow didn’t stick.

“There’s been no accumulation,” he said. “It’s just too warm.”

Precipitation will taper off Friday, setting the stage for drier, cooler weather overnight and on Saturday. Low temperatures Friday are likely to dip below freezing, as cold air flows into the region from Canada’s Fraser River Valley, Guy said.

“We’ll probably struggle to get up to 40 on Saturday.”

If any snow materializes, it’s likely to be Sunday night, he said. “The computer models are giving us mixed signals.”

The highest chance of snow will be at elevations above 500 feet in the Cascade foothills and in Whatcom County.

By Christmas Day, though, the precipitation is likely to clear off.