Forecasters warned Monday of the nation’s biggest potential snowstorm of the year across a wide swath of the northern U.S., while parts of the Midwest and South are bracing for another round of damaging tornadoes.

Almost 50 million Americans are already at risk for severe storms and potential tornadoes Tuesday, according to the National Weather Service’s Storm Prediction Center. Cities such as Chicago, Kansas City, Missouri, Tulsa, Oklahoma, St. Louis and Des Moines, Iowa, are all in the risk area. The storms “could pose a risk for a few strong tornadoes, large hail and damaging wind gusts,” the prediction center said. 

The prediction center also said “dangerous nighttime tornadoes” are possible Tuesday evening into Wednesday morning. Nighttime tornadoes are twice as likely to be deadly as daytime tornadoes.

Many cities and towns are recovering from a surge of severe storms that resulted in dozens of confirmed or suspected tornadoes in at least eight states and 32 deaths.

Meanwhile, Colorado, Minnesota, Nebraska, North Dakota, South Dakota, Utah and Wyoming are among the states that will face the brunt of a winter storm brewing from Monday to Wednesday that could break April snow records, the National Weather Service warned. Up to 30 inches of snow was possible in portions of South Dakota, the weather service in Rapid City said. 

“Strong winds and heavy snow will create whiteout conditions and significant drifting snow,” the weather service said, adding that the result could be “dangerous to impossible driving conditions and considerable disruptions to daily life.”

Developing:

►The weather service confirmed that EF-3 tornadoes with winds of up to 165 mph touched down in Wynne, Arkansas, and in Covington and Adamsville, Tennessee, on Friday and Saturday.