STONGEST TORNADO IN HISTORY? 300+ mph winds measured inside the Greenfield, IA tornado!

Breaking news! A 300 mph wind gust was measured above 160 feet above ground-level by mobile radar inside this #tornado near Greenfield, Iowa, making it one of the most powerful tornadoes documented in History. Incredibly, this rare drone footage was captured just prior to this historic wind measurement! The multiple vortex nature of this compact tornado vortex is a characteristic of the more powerful tornadoes of the Great Plains!