Cold high pressure over the Plains will slowly move eastward to the Southeast/Central Appalachians by Sunday.
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The cold air and upper-level energy over the Great Lakes and Northeast will create heavy lake-effect snow downwind from Lakes Erie and Ontario through Sunday.
In addition, moderate to heavy lake-effect snow will develop downwind from the Upper Great Lakes through Sunday, too.
Furthermore, moderate to heavy upslope snow will develop over parts of the Central Appalachians on Friday.
Meanwhile, a front over the Eastern Pacific will move onshore over the West Coast and move southeastward to the Southern Plains by Sunday.
Moisture associated with the system will produce moderate to heavy rain over parts of the Pacific Northwest and Northern California on Friday.
Snow will develop over parts of the Cascades, Northern Intermountain Region, and Northern Rockies.
By early afternoon, the boundary will pass the Northwest and California, rain will change over to snow over the Southern Cascades into the Sierra Nevada Mountains through Saturday morning.
A weakening front will move close to the Pacific Northwest Coast by late Saturday morning and dissipate by Sunday.
The system will bring more coastal rain and higher elevation snow over parts of the Pacific Northwest and Northern California through Sunday.
Furthermore, by Saturday afternoon, the lead front will move to the Southern High Plains and into the Southern Plains by Sunday.
The storm will produce significant wintry weather, with impacts over the Central Plains by late Saturday and the Ohio and Tennessee Valleys on Sunday.
Additionally, the storm will create severe travel disruptions.
Moreover, areas in the Central Plains and Central Mississippi Valley, especially along and north of Interstate 70, are likely to experience heavy snowfall, with a high chance (60-90 percent) of at least 6 inches of snow from late Saturday into Sunday.
Significant sleet and freezing rain are anticipated from eastern Kansas and the Ozarks extending eastward to the Tennessee and lower Ohio Valleys, also on Saturday into Sunday.
Further, rain will develop over parts of the Southern Plains/Lower Mississippi Valley overnight Saturday, and some areas of showers and thunderstorms will develop by Sunday morning. ■
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