...that is snows in Chicago...in February?
And when it does, the airplanes all get a sad. And very, very many airplanes live in Chicago, so when the airplanes in Chicago get a sad, so do lots of other airplanes in other places that aren't Chicago. So pretty soon, no @#$%^& airplanes anywhere are going anyplace, because they're all sad from the snow in Chicago, which only gets measurable snow six months out of the year, including an average of 10" in January and 8+ inches in February. SO GET IT TOGETHER CHICAGO!!