Jan 4, 2018
Low pressure developed off the Florida coast on the 3rd of January before moving north on the 4th. The intense low (956 mb) passed southeast of Nantucket Island during a period of very high astronomical tides. The forecast astronomical tide at Portland was 11.6 feet, close to its 12 foot flood stage. Storm force northeasterly winds developed at high tide , however nearshore waves only reached 8 to 12 feet during this short span of time. The winds produced a storm surge of 2.2 feet in Portland Ha
Source: NOAA National Weather Service Storm Events Database (event 736254). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Knox County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.