Heavy snow forecast on Snoqualmie Pass. Travelers advised to postpone I-90 trips

The Washington state Department of Transportation is recommending that travelers delay trips across Snoqualmie Pass on Interstate 90 Friday.

Heavy snow is forecast, plus freezing fog and low wind chill values, according to the National Weather Service.

It has issued a winter weather advisory until 6 a.m. Saturday morning.

Friday morning power outages made road cameras and electronic signs inoperable from Hyak to Stampede Pass southeast of Snoqualmie Pass.

There was snow on the Snoqualmie summit roadway in places, but chains were not required as of 10 a.m., according to the Department of Transportation.

However, the forecast for Friday calls for 4 to 8 inches of new snow to accumulate at the pass, with heavy snowfall making driving difficult at times.

Between 4 to 5 p.m. areas of fog near the summit could turn to freezing fog, according to the weather service.

Friday night 2 to 4 inches of new snow were forecast on I-90 at Snoqualmie Pass, with much of the snowfall expected between 7 and 9 p.m.

Wind chill values of 21 to 27 were forecast for Friday and Friday night.

Saturday the chance of snow at the summit is forecast at 50%, with snow most likely before 10 a.m. About an inch of snow is expected.

The windchill value will continue to be low at 20 to 25.

Sunday the weather should clear, with partly sunny weather and no snow forecast.

OR I-84 travel forecast

A winter weather advisory also was issued for Meacham, Ore., on Interstate 84 about 30 miles miles east of Pendleton in the Blue Mountains to just west of La Grande, Ore., until 4 a.m. Saturday.

A mix of rain and snow was forecast for Friday morning and evening at Meacham with 1 to 2 inches of snow likely from late evening to 10 p.m., according to the weather service.

Tri-Cities weather forecast

In the Tri-Cities, the winter 2024-’25 streak of no significant snowfall is forecast to continue.

There should be some relief from the rain, but also cooler temperatures.

Almost 3 inches of rain have fallen in the Tri-Cities since the start of December, which is about an inch more than normal.

Sunny and mostly sunny weather is forecast for the weekend, with patchy fog moving in for most of the coming work week.

Highs could drop to as cold as 36 by Wednesday during a winter that has yet to have a Tri-Cities daily high temperature of freezing or below.

Overnight lows will drop into the 20s starting Sunday night, according to the weather service.

This story was originally published January 10, 2025 at 11:02 AM.