The weather service predicted a large swath of southern Minnesota, including the Twin Cities, could get up to 20 inches of snow.
The National Weather Service is expected to send a survey crew to east Texas to asses damage in Diana and Ore City.
MINNEAPOLIS - A deadly storm system churning through the central US has blanketed parts of the Upper Midwest in heavy snow and ice and battered areas farther south with powerful winds and even tornadoes.
By Sunday night, 1,804 flights had been canceled into or out of USA airports, the website flightaware.com reported, including 148 flights in or out of the Minneapolis-St.
"They will look at the pattern of the damage to determine whether it was a real tornado or just strong winds", Meteorologist Stephanie Sine said. On Saturday, the storm caused the cancellation of almost 470 flights at the airport.
From the First Alert Forecast Team
Temperatures will drop down into the low-40s Sunday night, with highs Monday afternoon just making it up into the mid-60s. Some thunderstorms may pop up early Sunday afternoon in inland spots along the fast-moving sea breeze.
Other parts of the state were not as lucky. But, as the storm moved over them, they did record a 67mph wind gust. Storms also knocked down trees, caused airport delays and dropped hail on the Carolinas.
The high winds, with estimated speeds of up to 105 miles per hour, tore roof shingles and exterior siding off about six homes.
The storms stretched from the Gulf Coast to the Midwest and were moving into the Northeast and New England.
And another round of snow is possible midweek in the Upper Midwest.
The storms also killed a one-year-old girl when a tree fell on a recreational vehicle where she was sleeping, the sheriff's office in Bossier Parish, Louisiana, said. Lexington County being one of the hardest hit areas with downed trees and power outages. An EF-1 is classified as a "weak" tornado but brings high winds and can inflict moderate damage on communities.