MINNEAPOLIS — All winter, cross-country ski race organizers in this midwest metropolis faced weather that just wouldn’t cooperate. Heading into the weekend, it had not snowed in Minneapolis in nearly a month, with daily high temperatures above freezing every single day since late January. All this as a local nonprofit, the Loppet Foundation, was set to host the first cross-country World Cup events in America in more than two decades — after a last-minute, coronavirus...