March 29, 2018 5:08 pm Weather Quiz: Violent Tornadoes Make Up What Percentage of All Tornadoes? NBC 5 Chief Meteorologist Rick Mitchell asks: Violent tornadoes make up what percentage of all tornadoes? Wake Up to Something Good 1:47 Heavy rainfall affects parts of DFW, Kaufman County 2:43 Governor declares state of emergency after Oklahoma tornadoes 2:09 Aftermath of heavy flooding in Kaufman County 1:41 Multiple killed during Oklahoma tornadoes 6:20 5 Talk Street: Dallas Cinco de Mayo