Plan for rough winter driving conditions if you're planning to travel over Washington State mountain passes this weekend. There may be a SNOW BOMB coming.

The National Weather Service has issued a WINTER WEATHER ADVISORY for the Upper Slopes of the Eastern Washington Cascades in effect from 4 pm Friday until 4 am Sunday.

Winter Weather Advisory - Snoqualmie Pass, Washington

What You Need to Know

Snow may be heavy at times during the period of the Winter Weather Advisory, between 4 pm Friday, January 5th and 4 am Sunday, January 7th. It's possible that up 12 inches of snow above the 2500-foot level will accumulate, and winds may be gusty up to 35 miles per hour at times.

Travel could be very difficult to impossible. Widespread blowing snow could significantly reduce visibility. The hazardous conditions could make nighttime driving most difficult if not impossible at times.

Snoqualmie Pass NOAA Forecast Friday, January 5 - Monday, January 7

Friday: A chance of snow before 1 pm, then rain and snow. High near 31. West wind 10 to 13 mph, with gusts as high as 20 mph. The chance of precipitation is 80%. New snow accumulation of 1 to 3 inches is possible.

Friday Night: Snow, possibly mixed with rain, becoming all snow after 10 pm. The snow could be heavy at times. Low around 26. Southwest wind 8 to 11 mph becoming southeast after midnight. The chance of precipitation is 100%. New snow accumulation of 3 to 7 inches is possible.

Saturday: Snow. The snow could be heavy at times. High near 28. West wind around 10 mph. The chance of precipitation is 90%. New snow accumulation of 3 to 7 inches is possible.

Saturday Night: Snow, mainly before 10 pm. Low around 24. West wind around 8 mph. The chance of precipitation is 80%. New snow accumulation of 2 to 4 inches is possible.

Sunday: A 40 percent chance of snow. Mostly cloudy, with a high near 27.

Sunday Night: Snow, mainly after 10 pm. The snow could be heavy at times. Low around 20. The chance of precipitation is 80%. New snow accumulation of 1 to 3 inches is possible.

Monday: Snow. The snow could be heavy at times. High near 30. The chance of precipitation is 100%.

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