Colorado: At least five people were injured and a number of buildings were damaged as a series of tornadoes hit the eastern Colorado on Saturday afternoon.
Storm chasers reported that the twister travelled for about 10 miles on the ground.
Several other tornadoes were reported in the area of Wray, a town of around 2,300 about 12 miles from the Nebraska border.
Earlier in the day, the tornado damaged about a dozen fifth-wheel campers and caused some minor injuries near the community of Wiggins in Morgan County, about 65 miles northeast of Denver.
Hails were also reported across Colorado's north-eastern Plains, accompanied by several tornado warnings.
The National Weather Service has issued alerts for people to take shelter from large hail and severe thunderstorms.
According to reports, thunderstorms were expected to form over Kansas, Oklahoma, and central and west Texas Sunday, with the potential for tornadoes and hail that could cause damage.
Tornadoes are more common in the United States than in any other country. It receives more than 1,200 tornadoes annually.