CP
Ten days before Calgary was inundated last summer, supercomputers half a world away were spitting out predictions that showed the city would soon be flooded.
Using state-of-the-art weather forecasts that can see rain coming weeks before clouds appear on the horizon and a mathematical model that calculates how precipitation runs off anywhere in the world, Lorenzo Alfieri and his team of researchers in Reading, England, could see that the Bow River was almost certain to surge in late June to levels higher than those seen during the disastrous 2005 floods.