WATCH: Severe storms put 100 million on alert after tornado outbreak

Powerful storms are threatening millions after a tornado outbreak across the Plains, where over a dozen tornadoes were reported in three states.

​Powerful storms are threatening millions after a tornado outbreak across the Plains, where over a dozen tornadoes were reported in three states.   Powerful storms are threatening millions after a tornado outbreak across the Plains, where over a dozen tornadoes were reported in three states.