A low pressure system will shift across the Northeast on Monday, while a separate system develops over the Intermountain West.
An area of low pressure will lift northeastward across the upper Great Lakes and the Northeast. This system will usher gusty winds and a mixture of rain and snow across the northern Mid-Atlantic and New England. A cold frontal boundary associated with this system will stretch southwestward from Upstate New York to the southern Plains. As this frontal boundary transitions east northeastward, it will generate showers and thunderstorms across the southern and central Plains, as well as the lower and middle Mississippi Valley. High pressure will influence dry weather across most of the Southeast.
Meanwhile, a wave of low pressure will transition eastward from the upper Mississippi Valley to the Northeast. This system will produce a swath of light to moderate snow across the Great Lakes region. A frigid air mass will trail this system, bringing a blast of cold air to the northern tier of the country.
A separate system will move across the Intermountain West. High elevation mountain snow and valley rain will develop over the Pacific Northwest and the upper Intermountain West. By the afternoon and evening, this system will collide with cold air over the central and northern Plains. A mixture of rain and snow will result from the northern high Plains to the western edge of the Midwest.
Additionally, a Pacific cold front will generate late evening rain and high elevation snow over western Washington, western Oregon and northwest California. Dry weather will continue across the Southwest on Monday.
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