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Hurricane Katrina was devastating—but the Lake Missoula floods were on another scale entirely. Modern floods? Measured in millions of cubic feet per second. Missoula? Try 350 million. That’s up to 10 surdrops—the same unit used to measure ocean currents. And it wasn’t minutes or hours… it surged for days. We’re just beginning to grasp the true power of these ancient megafloods. | The Randall Carlson

One of the largest floods ever documented raced through north Idaho. It’s called the Missoula flood, and it occurred fairly recently, like 15,000 years ago. It’s one of the events we examine in “Idaho Geology, A Convergence of Wonders,” airing Sunday at 7 p.m. on Idaho Public Television. Here’s a taste of it. And you can read about it here on our website for the show. http://idahoptv.org/outdoors/shows/geology/ | Outdoor Idaho