Seattle-area weather forecast: Unseasonably warm Friday, ‘fast and furious’ rain this weekend, a colder-than-normal January

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If you have any plans over the next few days that require a break in the rain, do them on Friday. The National Weather Service in Seattle is predicting unseasonably warm temperatures and some dry air that day, followed by a blustery wet weekend that could stretch into a whole wet week.

Looking farther ahead, January is expected to be colder than normal in the Pacific Northwest, according to the weather service’s Climate Prediction Center. January in the Seattle area typically has highs of about 47 degrees and lows near 36 degrees, said weather service meteorologist Dustin Guy.

It’s less clear how much rain we can expect in the coming month, as the climate center says we have about equal chances of getting more rain than usual, less rain than usual or about the typical amount of 5.57 inches. Guy said the prediction center’s forecasts are focused on the overall outlook and are intentionally vague.

Thursday is expected to be “quiet,” with rain moving into Seattle by afternoon, Guy said. It will rain Thursday night, with blustery winds along the coast and northern interior.

On Friday, though, a warm front will temporarily bring warm, dry air and temperatures that could reach the mid- to upper 50s. Guy said he doesn’t expect Friday’s high to break Seattle’s Jan. 3 record of 58 degrees, but he said it could be close.

“It’s going to be quite warm and dry,” Guy said. “But then, the rain is going to come in fast and furious, and it’s going to get pretty windy.”

The rain and wind could last “right on through next week and maybe longer,” he said.

December was warmer and wetter than normal for Western Washington, according to the weather service. But the year as a whole was drier than normal, with annual precipitation coming in below average at five of the weather service’s Western Washington measurement locations.

The agency shared on New Year’s Eve a list of the most remarkable weather days of the year. You may remember some or all of these dates:

  • Warmest day: June 12 (95 degrees)
  • Coldest day, by high temperature: Feb. 4 (32 degrees) — the day after the first snowstorm hit
  • Coldest day, by low temperature: Feb. 5-6 (tie, 20 degrees)
  • Wettest day: Dec. 20 (3.25 inches, the most Seattle had seen on a single day this decade)
  • Most snow: Feb. 8 (6.4 inches)

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2020-01-02 01:12:00