A low pressure system will transition across the Great Lakes on Wednesday, while a cold frontal boundary approaches the Northwest.
An area of low pressure will move eastward across the Great Lakes. This system will continue to usher light to moderate snow over the northern Plains, while a mixture of rain and snow affects the upper Midwest. Just to the east, a mixture of heavy rain, freezing rain and snow will impact portions of New England. A cold frontal boundary associated with this system will extend south southwestward from the upper Midwest to the western Gulf Coast. As this frontal boundary transitions eastward, it will initiate rain and thunderstorms across the Deep South, the Mid-Atlantic, southern New England and parts of the Midwest. Most states across the southern and central Plains should stay clear of precipitation.
Meanwhile, a Pacific cold frontal boundary will approach the Northwest. This system will bring moderate to heavy rain to western Washington, western Oregon and northwest California. The interior portions of the Pacific Northwest can expect a mixture of rain and snow. By Wednesday evening, snow showers will become widespread in the northern Great Basin and the upper Intermountain West. High pressure should influence a dry weather pattern across most of the Southwest.
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