Coastal NSW faces several more days of hazardous surf after a powerful low-pressure system churned up huge waves and a storm surge seen only once every couple of decades |p_hannam
A buoy in Botany Bay registered significant wave heights reaching 8.44 metres, an event that would typically be seen about once in 40 years, said Mitchell Harley, a senior lecturer in the University of NSW’s Water Research Laboratory.
Beach erosion could have been much worse had Tuesday night’s big storm coincided with king tides, or if the angle of the waves had been about 30 degrees further to the east. Instead, the waves were mostly from the south, hitting parts of the coastline that tend to get hammered more regularly, he said.
The storm system also formed close to the coast and moved away quickly. With a longer range for the waves to develop given the strong winds, the impacts would have been more dramatic, he said.
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