Temperatures were 20 to 40 degrees F (11-22 degrees C) below average in parts of Montana, North and South Dakota, Minnesota, Iowa, Wisconsin, Michigan and Nebraska, according to the National Weather Service.
Temperatures were 20 to 40 degrees F (11-22 degrees C) below average in parts of Montana, North and South Dakota, Minnesota, Iowa, Wisconsin, Michigan and Nebraska, according to the National Weather Service.