Tonight's Guest WeatherBrains are two legends. Our first WeatherBrain is an American meteorologist and prolific severe convective storms researcher. He is a seminal contributor to the modern conception of the supercell thunderstorm. Charles Doswell, welcome to WeatherBrains!  Joining us as second Guest WeatherBrain ranks among the world's foremost experts on wind damage to the built environment. In addition to being a structural forensic engineer and meteorologist, he is a pioneering storm chaser. He has conducted more than 10,000 damage surveys of hailstorms, tornadoes, and hurricanes over the past 40+ years.  Dr. Tim Marshall, welcome!