Mar 11, 2011
A low pressure system moved northeast from the Ohio Valley to the Great Lakes and strengthened. Heavy rain moved into upstate New York late in the evening on the 10th, and continued into the overnight hours on the 11th. Rainfall amounts ranged from around 1 to 2 inches in areas that experienced flooding in central New York, with higher amounts in excess of 3 inches farther southeast across Sullivan county. The rain combined with melting snow which added to the runoff and flash flooding.
Source: NOAA National Weather Service Storm Events Database (event 293489). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Cortland County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.