FloodZoneMap.org

Flash Flood — Cortland, NY

Jul 14, 2017

A warm front began advancing across Central New York by early in the afternoon. This feature triggered numerous rounds of heavy rain producing thunderstorms from the southern Finger Lakes through the Southern Tier of NY. Localized rainfall amounts were estimated to exceed 3 inches across southern Cortland county. Several storms moved over the same locations, contributing to areas of urban and small stream flash flooding.

Source: NOAA National Weather Service Storm Events Database (event 709175). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Cortland, NY

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.

View Cortland County flood data →

More Flood Stories

Flash Flood

Cortland, NY · Jun 22, 2025

A mesoscale convective system (MCS) dropped southward across Central NY from eastern Ontario, moving into an environment with plenty of moisture and instability during the early morning hours.

Read the full account →
Flash Flood$100K damage

Cortland, NY · Oct 4, 2021

A weak upper level disturbance moved through Central New York on this day, triggering heavy rain producing thunderstorms along a stationary front during the late afternoon and evening.

Read the full account →
Flash Flood

Cortland, NY · Jun 20, 2024

A slow-moving cluster of thunderstorms developed along a boundary in a hot, humid and unstable environment. Isolated rain amounts in excess of 2.5 to 3.0 inches over a short period of time during the afternoon swelled local creeks and streams causing flooding in portions of…

Read the full account →
Flood$25K damage

Cortland, NY · Dec 25, 2020

A complex storm system moved from the Lower Mississippi valley to lower Ontario during this time period. Warm and moist air surged northward from the Gulf of Mexico bringing rain and temperatures in the lower 50s.

Read the full account →