Thunderstorms lingered above New York airports on Saturday. LaGuardia took a direct hit . The FAA imposed a short ground stop on LGA, Newark, and JFK. Officials pointed to a staffing issue. They removed it fast. But the damage was done. Hundreds of flights at LaGuardia never took off. Nationwide, 1,191 flights ran behind schedule. Another scores of got scrubbed. Delta suffered the most . Airlines counted more than 1,000 disruptions in just a 48-hour span. A line of rough weather kept battering its main hub.