Tornadoes touched down in northern Colorado and southern Wyoming on Thursday afternoon killing at least one person. , damaging buildings and turning over tractor-trailer vehicles. Windsor, Colorado was the hardest hit area as the large funnel came down and put rail tanker cars on their sides. As of late afternoon emergency personnel were still trying to determine how many people were hurt, and how badly. Splintered wood, bent metal and other debris cluttered roads, yards and agricultural fields in and around Windsor. The Colorado Governor declared a state of emergency for Weld County, mobilizing the Colorado National Guard to assist with disaster response. Tornadoes also touched down in Laramie and Cheyenne, Wyoming during the late afternoon.