It's going to be a wet long weekend.
Sydney will cop a drenching this weekend, with a wet weather system rolling across the New South Wales mid north coast set to intensify.
Heavy rain may lead to possible flash flooding in parts.
Bureau of Meteorology forecaster Rebecca Kamitakahara says for Sydney, expect rain and potentially some thunderstorms, particularly in the Eastern parts.
"We have a coastal trough which is deepening, and that's leading to an intensification of rainfall along the Northern Coast", she said.
If you are heading away for the long weekend, here's a heads up of the heaviest hit areas.
The Bureau of Meteorology (BoM) issued a severe weather warning on Friday for the entire mid north coast, parts of the Northern Rivers and Hunter districts including Grafton, Coffs Harbour, Port Macquarie, Taree, Kempsey, Woolgoolga, Sawtell, Dorrigo, Seal Rocks, Bulahdelah, Wingham and Nelson Bay.
It comes as police urge motorists to slow down, with double demerits now in force.
With the slippery roads, and visibility greatly reduced, inspector Phil Brooks says motorists need to make sure they're rested before starting the journey.
"We're hoping those that are going to begin a long journey have had at least 8 hours of sleep before they start their drive, and they pull over every two hours".