Winter storm warnings can be a happy sign your ski vacation is going to be a good one. But they can also mean a delay -- or, at worst, the end -- of a long-planned and long-anticipated trip to the hills. And now things are getting worse. As the rough economy has shrunk demand for travel, airlines have shrunk their capacity for travelers. And as that capacity has shrunk, the New York Times reports, the airlines' ability to accommodate weather-stranded travelers has also receded.