Weather Service adding severe thunderstorms to cellphone alerts

With last year’s derecho, Iowans learned the hard way that highly destructive weather events can be something other than tornadoes or floods. Technically, the derecho was a severe thunderstorm, the most destructive thunderstorm in U.S. history. National Weather Service meteorologist Alex Krull says they’re soon adding severe thunderstorms — and, thus, any future derecho — […]