A winter storm moving across the central Plains and Upper Midwest this week is expected to bring heavy snow, sleet and freezing rain to parts of the United States, while tornadoes could form farther south, officials have warned. The storm is expected to bring snowfall to the Central High Plains as it tracks northeast into the Great Lakes, likely producing moderate to heavy snow, sleet and freezing rain by Tuesday, the National Weather Service said. More than 12 inches of heavy snow is expected to quickly accumulate from the Panhandle of Nebraska through southwest Minnesota, it said. NOAAThe weather system is also expected to bring significant freezing rain to parts of northeastern Nebraska through southern Minnesota, the National Weather Service said. The thunderstorms could bring frequent lightning, severe thunderstorm wind gusts, hail and "a few tornadoes," the National Weather Service said.

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