Yesterday's winter storm across the Northeast will begin to wind down today as it departs out into the Atlantic Ocean. As the low moves away any organized areas of snow will begin to taper and diminish in coverage. However, gusty Northwest winds behind the storm will lead to the development of lake effect snow across interior parts of the Northeast through Monday.
At the same time we will see an area of very cold high pressure move southward out of Canada and into the northern Plains and Midwest by Tuesday. Temperatures associated with this air mass will be anywhere from 10 to 25 degrees below averages across the Northern Plains, Mid-Mississippi Valley and into the Ohio Valley through the day Tuesday. Low temperatures at night will be dangerously cold and well below zero with the core of the cold centered across Minnesota, Iowa, North & South Dakota.
As for the West, some moisture will clip the Northwest coastline bringing light rain and higher elevation snow to parts of Washington and Oregon Sunday and Monday. A more potent system will bring steadier rain to these areas and also looks to extend southward to include the northern California coast as we head into Tuesday. There will be higher elevation snow in the mountains as well.