FloodZoneMap.org

Flash Flood — Sullivan, PA

Aug 28, 2011

Hurricane Irene moved north-northeast along the Mid-Atlantic Coast from North Carolina to Long Island New York. The tropical system produced extensive flooding and strong damaging winds over from the Endless Mountain region of Sullivan County southward to the lower Susquehanna Valley, with heavy rainfall amounts generally between 2 to 4 inches and several reports of non-thunderstorm wind damage. Localized 5 to 6 inch rainfall totals were also observed. Despite the widespread heavy rainfall, the

Source: NOAA National Weather Service Storm Events Database (event 330001). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Sullivan, PA

This event is one of many recorded floods in Sullivan County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Sullivan County flood data →

More Flood Stories

Flash Flood$7.0M damage

Sullivan, PA · Oct 21, 2016

A potent cold front pushed into an unseasonably warm and humid air mass, generating widespread showers and thunderstorms. There was a considerable amount of both low level and deep layer shear, and some of the storms produced damaging winds.

Read the full account →
Flash Flood$1.8M damage

Sullivan, PA · Apr 26, 2011

Several bands of strong to severe thunderstorms developed along two north-south axes of low level confluence across central Pennsylvania into upstate New York.

Read the full account →
Flash Flood

Sullivan, PA · Jul 13, 2025

A shortwave trough, moving through an unstable and extremely moist air mass (PWATs over 2.00) over central Pennsylvania, allowed for showers and thunderstorms to develop across the area during the afternoon hours of July 13, 2025.

Read the full account →
Flood

Sullivan, PA · Jul 14, 2025

A shortwave trough, moving through an unstable and extremely moist air mass (PWATs over 2.00) over central Pennsylvania, allowed for showers and thunderstorms to develop across the area during the afternoon hours of July 13, 2025.

Read the full account →