Sydney dam levels rise above 60 per cent after weekend downpour

Greater Sydney's dam levels have risen above 60 per cent after significant weekend rainfall, a jump of more than 20 per cent.

A boom floats across a small bay near the dam wall at Warragamba Dam in Warragamba, Australia, Wednesday, 29 January, 2020. Source: AAP

Dam levels across greater Sydney have spiked more than 20 per cent amid heavy weekend rainfall, with enough water for as much as 150,000 Olympic size swimming pools flowing into Warragamba Dam.

Sydney, the Central Coast and the Blue Mountains were soaked after receiving between 200mm and 400mm of rain from 9am Friday to 5pm Sunday, with additional rain expected on Monday and through the week.

The Bureau of Meteorology suggested on Monday the Harbour City had not experienced such rainfall since before the new millennium.

Water NSW data on Monday morning showed that greater Sydney dam levels were at 64.2 per cent, up 22.3 per cent in seven days.

Source: Water NSW

Warragamba Dam recouped a year's worth of water in one weekend, rising 17.7 per cent to sit at 60.7 per cent at 10.30am on Monday. Some 360,000 megalitres of water flowed into the dam - almost 150,000 swimming pools.

The dam this time last year was 61.4 per cent full.

Source: Water NSW

Prospect Dam is more than 90 per cent full, while Woronora Dam to Sydney's south is almost 60 per cent full, jumping 25 per cent.

The Bureau of Meteorology has forecast more severe weather conditions on Monday with heavy rains, strong winds and damaging surf possible along the entirety of the NSW coast and inland southern NSW.

Flash flooding remains a possibility in several NSW regions, including Sydney.