Aug 9, 2013
Tropical moisture in place across southern New England ahead of a cold front resulted in precipitable water values increasing to 2-2.5 inches (2 to 3 times normal). The cold front provided enough lift for widespread rain with embedded thunderstorms across all of southern New England. The high moisture content of the atmosphere resulted in torrential downpours across much of the region, which led to flash flooding in some areas.
Source: NOAA National Weather Service Storm Events Database (event 461247). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Hampden County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.