An area of low pressure will brush across the East Coast on Thursday, while a Pacific cold front generates heavy precipitation over the Northwest.
A wave of low pressure will move northeastward over the western Atlantic, and is expected to brush across the southern Mid-Atlantic. This system will usher moderate to heavy rain over the southeastern quadrant of the country. Embedded thunderstorms are forecast to develop over southern Florida.
Just to the north, a separate area of low pressure will transition east southeastward across the Great Lakes and the Northeast. This system will bring a blast of cold air to the upper Midwest. Snow accumulations will range between 8 to 12 inches across northeast Minnesota and northern Michigan. Lake effect snow will be possible downwind of Lake Ontario. Up to 8 inches of snow is expected across portions of western New York.
Meanwhile, a cold frontal boundary will inch across the West Coast. A plume of moisture will interact with this frontal boundary, which will lead to moderate to heavy rain across western Washington, western Oregon and northern California. Prolonged heavy rain could lead to flash flooding along the northwestern corner of California and the southwestern corner of Oregon. A mixture of rain, freezing rain and snow will affect the higher elevations of the Pacific Northwest and the upper Intermountain West.
High pressure over the coast of southern California will influence warm and dry conditions across the Southwest. Temperatures will jump 5 to 10 degrees above normal across the Desert Southwest on Thursday.
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