June 10 was to be a day nobody would forget. We started in North Platte and analyzed data till early afternoon when a cell blew up west of Julesburg, Colorado on the dry line. I rallied the gang westward and arrived west of Big Spring on US30 just in time to watch the show start. This supercell developed into a beautiful classic with nice wall cloud, clear slot, FF core and an incredible tornado that lasted 28 minutes! This tornado morphed from a small nub funnel with debris cloud, into a full fledged strong cone tornado. The structure of this beast was a sight to behold!!!