Mountainous areas of the Pacific Northwest will see even more snow , with the largest accumulations on the eastern slopes of the Cascades , according to the weather service . January : Seattle warns for significant snowfall . It could be among area 's 10 worst since 1900 . Up to 3.5 inches of snow in Cascade Mountains forecast . Officials warn of treacherous travel conditions .
January : Seattle warns for significant snowfall . It could be among area 's 10 worst since 1900 . Up to 3.5 inches of snow in Cascade Mountains forecast . Officials warn of treacherous travel conditions .