Run time only 2 minutes . The Pacific storm system will bring heavy snow to the western U.S. mountains along with windy conditions to the Northwest, central to northern Rockies and adjacent High Plains.Warming trend east of the Rockies with record warmth possible over thecentral U.S. through early week. Springlike preview to the Northeast.Relatively tranquil weather over the lower 48 on Saturday will begin tochange on Sunday, beginning in the Pacific Northwest as a fairly strongstorm sy...