Thunderstorms hovered over New York airports on Saturday. LaGuardia took a direct hit . The FAA issued a short ground stop on LGA, Newark, and JFK. Officials pointed to a staffing issue. They lifted it fast. But the fallout was done. Hundreds of flights at LaGuardia never took off. Nationwide, over a thousand flights ran behind schedule. Another 108 got scrubbed. Delta suffered the most . Airlines counted over a thousand disruptions in just a 48-hour span. A line of rough weather kept pounding its main hub.