Coastal Flood — Knox, Maine

2024-01-13 · Knox, Maine

Event narrative

The astronomical tide in Portland was 11.2 feet (MLLW) at 1205 pm. Flood stage is 12 feet (MLLW). The gale to storm force onshore winds produced a storm surge of 3.37 feet in Portland Harbor. The resulting storm tide topped out at 14.57 feet (MLLW) in the Forest City with the tide remaining above flood stage for two hours and 38 minutes.

The storm created significant damage to waterfront areas of Knox County due to both inundation flooding and over wash from large coastal swells that overtopped dunes and seawalls. Flooding was up to one foot deep in businesses around Camden Harbor with significant flooding of the Camden Yacht Club where roads were closed due to flooding up to one foot deep. Significant debris in piles was reported near and along the shoreline in Saint George from damage. In Rockland, the boat launch was damaged at Harbor Park. Crabtree Point road adjacent to Narrow Place Beach was eroded due to flooding on North Haven. Boulders were moved from roadways along Ash Point Drive in Owls Head. In Port Clyde, Marshall Point Road was washed out for the second time this week.

Wider weather episode

The second severe storm in a week's time struck the northern New England coastline during the middle of January. An intense and rapidly deepening area of low pressure over the Great Lakes region (979 mb) combined the highest astronomical tides of the month to produce extreme flooding along the coast. Portland had its all-time storm tide, posting a record flood water level (records 1912-present). Storm force southeasterly winds occurred along the coast with nearshore waves of 15 to 20 feet leading to wave run-up impacts along exposed areas, especially areas vulnerable to southeast swells. A flash flood warning was issued for Coastal Cumberland and York Counties prior to high tide due to rapidly rising ocean water and fresh waters as heavy rain accompanied a coastal front just prior to high tide.

Source: NOAA Storm Events Database, event_id 1158762. Narrative written by the NWS forecast office that issued the report.