Aug 3, 2003
A tropical air mass was in place over southern Vermont on August 3. With a strong disturbance over the Great Lakes adding weak lift to a very unstable atmosphere, scattered showers and thunderstorms erupted during the afternoon hours. A slow moving storm over Windham County produced doppler radar estimated rainfalls of 3 to 4 inches in about four hours time. The torrential rains took a toll, washing out roads in the city of Londonderry. County Highway 121 was washed out in the Town of Windham.
Source: NOAA National Weather Service Storm Events Database (event 5375158). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Windham County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.