A severe late-winter storm is forecast to hit the central United States with a combination of blizzard-like conditions and thunderstorms as it quickly strengthens on Sunday, March 15.

By the morning of March 15, the storm is set to move across swaths of the Plains as it moves toward the Great Lakes, impacting millions with severe weather, according to AccuWeather.

“This storm definitely means business,” John Feerick, AccuWeather senior meteorologist, said, adding the weather company has labeled it a “March megastorm.”

The low pressure system originates over Wyoming as it heads east, and heavy snow is expected north of the low pressure track, the National Weather Service forecasted. Snow between 1 and 3 feet could land on the upper Midwest. Wind gusts of more than 50 mph could create blizzard conditions in the region.

Conditions are expected to continue into March 16, when the weather service said the storm reaches peak intensity. Wind chills in the northern Plains could reach -20s while parts of Texas could feel below freezing wind chills, the weather service said.