Saturday Night: It’ll be a mostly dry night for lower elevations, although small rain chances are possible in the foothills. Wet weather will pick up across the map after midnight, with snow levels dropping down to pass level for Snoqualmie by the wee-hours of Sunday morning. Clouds will dominate the skies on Saturday night. Overnight lows will fall into the 30s and 40s. Winds will be light for the most part. Although, south-south easterly gusts up to 25 MPH will start to impact the Blues after midnight.
NWS Pendleton has issued a Winter Storm Warning for the Cascades (above 3,500’) in Kittitas and Yakima counties. This runs from 1 AM Sunday – 4 AM Monday.
NWS Pendleton has issued a Winter Storm Warning for the northern Blues (above 4,000′) in Walla Walla and Umatilla counties. This runs from 1 AM Sunday through 10 AM Monday.
Winter Storm Warning
Sunday: Expect a wet start to Sunday, and a very wintry start to Snoqualmie Pass. In fact, it’ll be snowing for most of the day for our Cascade passes. We’d highly recommend against traveling in the Cascades for Sunday—unless you absolutely have to. The Lower Yakima Valley, basin, and foothills should trend much drier by the late morning to early afternoon. However, rain chances will stick around throughout the day for the Kittitas Valley. No surprise here: Sunday will be a mostly cloudy to overcast day. Highs will be noticeably cooler compared to Saturday, but we’ll still be about 5-10 degrees above average for late December. Highs will be in the 30s and 40s. South-westerly winds will pick up throughout the day for the Blues, eventually spilling over into the Blue Foothills and Lower Columbia Basin after lunchtime. Gusts will peak around 20 MPH for the basin, although they’ll be much stronger during the early evening. They’ll peak between 45-50 MPH for the Blues and foothills during the late afternoon to early evening.