USGS Updates Burn Scar Flood Model
A quarter inch of rain in fifteen minutes can turn a freshly burned slope into a river of mud and boulders. The warning system has long leaned on a model built from Southern California canyons, then applied to the entire West. A new USGS update refits it for three regions and beats the old version by roughly 15 to 60 percent, with fewer false alarms. A strong El Niño is on the way, so read this before the next storm.