KEITHVILLE, La. — A volatile storm ripping across the U.S. spawned tornadoes blamed for killing at least three people in Louisiana, and the line of punishing weather threatened neighboring Southern states into the nighttime hours Wednesday.
To the north, the huge storm system delivered blizzard-like conditions to the Great Plains and was expected to push more snow and ice into Appalachia and New England. The wintery blast dumped more than 2 feet (60 centimeters) of snow in parts of South Dakota.
