May 23, 2020
Surface low pressure (and an upper level low) passed just south of New England. At the same time, a strong upper level short wave was passing to our north and a strong backdoor cold front was moving southward into northeastern Massachusetts. A mid-level deformation zone set up over southeastern MA, which allowed an area of heavy rain to persist for several hours over Martha's Vineyard and Nantucket, producing some flooding.
Source: NOAA National Weather Service Storm Events Database (event 884849). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Dukes County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.