Gusts of 102 km/h were recorded in Bellambi, in Wollongong, before 7.30am. Sydney Airport recorded a gust of 83 km/h before 7am, North Head hit a peak of 87km/h and strong gusts were also recorded at Kurnell and Wattamolla.
A hazardous surf warning is also in place across the entire NSW coast, with conditions not expected to ease until Thursday.
A peak wave exceeding 10 metres was measured by a wave rider buoy just offshore of Sydney on Tuesday.
Sydneysiders woke up to a wet city on Tuesday, after the bulk of the rainfall fell in the early morning.
Little Bay, in Sydney’s south-east, recorded 23 millimetres of rain between 9am on Monday and 7am on Tuesday, most of which fell in the few hours before sunrise.
Eleven millimetres of rain fell at Wahroonga on the upper north shore during the same time period, and 10 millimetres fell in the Royal National Park.
One of the two eastbound lanes was closed at the M5 East Cooks River tunnel due to flooding early on Tuesday. The lane was reopened before 6.30am.
“We are still expecting shower activity during the day – but we aren’t expecting those types of falls,” the bureau’s Rebecca Kamitakahara said, noting most areas on the coast would experience 10 to 20 millimetres of rain on Tuesday.
NSW SES said they had responded to more than 150 jobs across the state since midnight on Sunday, advising residents to park their cars undercover and away from trees.
It comes after an intense low-pressure system forming off NSW brought the highest snowfall for the season to the state’s highest resorts and heavy rain to the South Coast on Monday.
In Sydney, areas of the city’s north-west experienced a hail storm on Monday afternoon, with pictures posted to social media showing the ground blanketed in what looked like snow.
However, Ms Kamitakahara said the fine hail was actually a function of “quite cold air” in the upper and middle atmosphere.
“I’ve been asked a number of times whether it snowed in Sydney yesterday,” she said. “The answer is: no – it was just a lot of small hail.”
Although there are isolated showers scheduled for the rest of the week, Ms Kamitakahara said Tuesday was “definitely the worst” of the rainfall.
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Mary Ward is a reporter at The Sydney Morning Herald.
Matt Bungard is a journalist at The Sydney Morning Herald.