Winter storm warnings have been issued in four states: Oregon, Washington, California and Minnesota. In northwestern Oregon and parts of Washington, including the Willapa Hills, there will be light snow showers until midnight Friday. Cities impacted include Mary's Peak, Brooklyn, Sunset Summit, Wilson River Summit, Valsetz, and Horton.

Heavy snow and high winds are forecast to impact travel on Oregon’s Cascade Mountain roads and passes from Thursday night into Saturday afternoon.

Places to the south of the Great Lakes will see the highest risk of disruptive ice from late on Wednesday into Thursday On the northern side of the storm, the precipitation will mainly be falling as snow but the most dangerous conditions are expected through portions of western Maryland,