The Illawarra was one of the wettest places in the state over the weekend, with several sites across the region recording more than 100 mm of rain in the 24 hours from Sunday morning.
According the the Bureau of Meteorology, a rainfall station at Mount Pleasant recorded 142 mm of rain while a site near Kangaroo Valley clocked 160mm in the hours to 9am Monday.
Strong winds were also recorded across the region on Monday morning, with Bellambi and Kiama, on the South Coast, each recording wind gusts of 91km/h around 1am.
These, along with high seas and potential flooding in the region's rivers, are being caused by a slow moving low pressure system currently just off the Illawarra coast.
More than 100 millimetres of rain also fell at Bellambi (110mm), Rixons Pass (104mm), Russell Vale Colliery (103mm) and Dombarton (116mm).
The Albion Park weather station recorded 88mm, while 79mm fell at a radar at Port Kembla and 87mm fell at Kiama.
The rainfall, which is set to continue through most of Monday, takes the monthly total for the Bellambi weather station to 146mm - which is just 4mm shy of the rainfall total for the previous three months combined.
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However, it's nowhere near the February total of 399mm, when the region copped its drought-breaking soaking for four consecutive days.
Other areas across the state which were hard hit by the weekend's deluge included Lake Macquarie, in the Hunter, and Mangrove Mountain on the Central Coast.
The damaging winds, averaging 60 to 70 km/h with peak gusts in excess of 90 km/h are expected along the coastal parts of the Illawarra and the South Coast districts throughout Monday, with a severe weather warning remaining in place for the region.
The Bureau is also predicting that the rain will continue into Tuesday - which has a 95 per cent chance of rain forecast - before a dry and mostly sunny end of the week and weekend.
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