Aug 8, 2018
A cold front moved into New England the evening of August 7th and stalled just north of Massachusetts. The airmass over the state was very humid and unstable. This generated strong thunderstorms, some causing damage. The front lingered north and west of the state on August 8th, forming thunderstorms and downpours in Massachusetts on that day, especially near Natick.
Source: NOAA National Weather Service Storm Events Database (event 780501). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Middlesex County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.