Jul 1, 2017
A very strong shortwave and associated cold front were approaching from the west on the morning of July 1st. Ahead of the front, a very warm and moist air mass was in place over New England with values of precipitable water around 2 inches. Strong directional and speed shear contributed to numerous super cells that produced damaging winds. In addition, very heavy rain associated with these cells produced extensive flash flooding to many area roads with damage totaling in the millions.
Source: NOAA National Weather Service Storm Events Database (event 715632). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Coos County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.