 get much warmer than normal, which means that is our main source of energy. Gallus said the weather pattern, known as El Nino, characterized by warmer ocean temperatures that prompt more precipitation and provide fuel for severe weather, is now shifting to La Nina, marked by cooler seas and drier weather. That could cause the rest of the tornado season to be less active. Gallus said the high number of tornadoes in the region was unusual since climate change models predict Iowa and neighboring states west of the Mississippi should be seeing