Sep 11, 2023
Training showers and thunderstorms developed along a slow moving frontal boundary stretching from Connecticut to Southwest Maine on the evening of the 11th. The anomalously moist airmass caused moderate to heavy widespread rain of 1 to 3 inches. A localized axis of heavy rainfall between 4 to 6 inches extended from central Massachusetts across the Stateline and into Nashua, New Hampshire. Flash flooding developed over Nashua, Hollis, and Hudson with numerous water rescues and flooded basements.
Source: NOAA National Weather Service Storm Events Database (event 1131278). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Hillsborough County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.