SOUTHEAST WA AND NORTHEAST OR – A winter storm warning is in effect until 4 a.m. today where heavy snowfall of up to 2 inches is expected in Washington, Blue Mountains foothills, foothills of Oregon’s Northern Blue Mountains and Southern Blue Mountains and the towns of Pendleton, Pilot Rock, Heppner, Condon, Fossil, Dayton, Waitsburg and Walla Walla. Travel can be dangerous, especially via Highway 84 through the Blue Mountains, US 395, and SR 11. You can get the latest road conditions by calling 511.
A winter weather advisory is in effect until 10 a.m. today for the eastern slopes of the Oregon Cascades where snowfall can reach 3 to 4 inches. Gusty winds will bring blowing snow and windblown snow.
Another wind chill advisory is in effect until noon today for Disautel Pass, Brewster, Badger Mountain Road, Omak, Bridgeport, Nespelem, Mansfield, Oroville, Waterville and Okanogan where winds will be below zero until – 20 degrees.
A special weather statement is also in effect for eastern Washington and northeastern Oregon, including the Cascades and Blues. Eastern Columbia River Gorge of Oregon-Lower Columbia Basin of Oregon-Grande Ronde Valley-Wallowa County-Northern Blue Mountains of Oregon Southern Blue Mountains of Oregon-John Day Basin-Ochoco- John Day Highlands-Foothills of the Northern Blue Mountains of Oregon-Foothills of the Southern Blue Mountains of Oregon Eastern Slopes of Oregon Cascades-North Central Oregon-Central Oregon-Eastern Columbia River Gorge of Washington-Kittitas Valley-Yakima Valley-Lower Columbia Basin of Washington-Foothills of the Washington Blue Mountains-Northwest Blue Mountains-East Slopes of the Washington Cascades-Simcoe Highlands-Including the cities of Arlington, The Dalles, Boardman, Hermiston, Ione, Cove, Elgin, La Grande, Union, Enterprise, Joseph, Wallowa, Meacham, Tollgate, Long Creek, North Powder, Ukiah, Dayville, John Day, Mitchell, Monument, Spray, Brothers, Heppner, Condon, Fossil, Camp Sherman, La Pine, Sisters, Sunriver, Dufur, Maupin, Moro, Bend, Madras, Prineville, Redmond, Brin e Salmon, Ellensburg, Thorp, Naches, Sunnyside, Toppenish, Yakima, Connell, Prosser, Tri-Cities, Dayton, Waitsburg, Walla Walla, Ski Bluewood Resort, Appleton, Cle Elum, Cliffdell, Goldendale and Bickleton. This is due to dangerously cold weather temperatures due to an arctic air mass. Most of the highs in our region will be below freezing with overnight lows in the single digits and in the teens. Wind chills during the coldest temperatures will reach sub-zero temperatures – some at higher elevations being around -10. It is important to watch for frostbite, hypothermia and other conditions that could be dangerous due to its weather. Please dress in layers and cover as much exposed skin as possible. Uncovered pipes are also susceptible to freezing and bursting.
Another cold and snowy day awaits us. Moderate to light snow will continue its morning pair in some areas with a short wave trough coming south across southern Washington and northern Oregon. This snow is coming from snow bands across the lower Columbia Basin with a snowfall rate of 0.25 to 0.50 inches per hour leading to another 1 to 2 inches accumulation today.
A dry arctic air mass arrives early in the New Year which will give us light winds, clear skies and snowpack in some areas with single-digit numbers and some late Saturday morning wind chills as low as -5 to -15 degrees.
However, on Sunday, a powerful upper low coming over the North Pacific off British Columbia will bring us warmer temperatures. A frontal system can bring snow to the mountains.
Next week an upper level trough and upper level ridge from the Pacific will give us gusty winds and mountain snow.