Heavy rain and thunderstorms are forecast to further drench parts of NSW, with authorities warning powerful waves and high swells will make the coast dangerous.
The NSW coastline is set to be battered by heavy rain and thunderstorms, with Cyclone Uesi causing powerful surf and very dangerous conditions over the weekend.
Uesi is tracking towards Lord Howe Island, 600 kilometres east of Port Macquarie, with destructive winds and intense rainfall forecast to hit the island from Thursday.
The Bureau of Meteorology says the cyclone should become an ex-tropical cyclone system as it passes over the island in the early hours of Friday morning.
Winds are forecast to gust up to 150km/h and about 150 millimetres of rain could drench the island over 24 hours.
The bureau’s NSW weather services acting manager, Mike Funnell, says Uesi will cause powerful surf along the NSW coastline with a separate weather system contributing to high swells.
Mr Funnell says the state’s already battered coast will likely be further eroded over the next few days.
“The sea is going to be a very dangerous place to be this weekend,” he said in Sydney.
A hazardous surf warning has been issued for the Byron Bay coast on Thursday and most of the state’s coastline on Friday.
Rain is forecast for much of the coast on Thursday and Friday with Sydney, the Northern Tablelands, Mid-North Coast, Hunter and South Coast to get a drenching.
A severe thunderstorm warning has been issued for the northeast with Lismore, Tenterfield, Byron Bay, Ballina and Casino facing possible flash flooding.
Flood warnings are in place for several rivers, including the Tweed River at Tumbulgum and the Orara River at Glenreagh, with the bureau saying many waterways are already saturated after last week’s record rainfall.
The NSW State Emergency Service has also warned of minor flooding in the upper Nepean River at Menangle in Sydney’s southwest.
Marine Rescue NSW operations director Andrew Cribb warned most coastal areas will be extremely dangerous on Friday and the weekend.
He urged rock fishers to avoid coastal areas completely and advised boaters as well as surfers to rethink their plans.
NSW Police Deputy Commissioner Gary Worboys urged people to drive safely on the roads and not enter floodwaters.
About 21,000 people across Sydney and the Central Coast are still without power after last weekend’s record rainfalls.
Many are bracing for more days without power as utility company Ausgrid works to get electricity back to all its customers by the end of the weekend.
Ausgrid has asked all levels of government for assistance, particularly with clearing downed trees.
Endeavour Energy on Wednesday night said fewer than 50 of its customers were still without power. It plans to restore power to all homes by Thursday night.
The recent rain has boosted Sydney’s parched dams, with Warragamba Dam now at more than 73 per cent capacity, surging from 43 per cent a week ago.