Certain sections of the northern rivers have flood warnings in effect, and the NSW State Emergency Service is advising northern communities to prepare for possible flooding.

The NSW State Emergency Service is cautioning northern NSW communities about the flood risks in areas still saturated from prior rains. Source: AAP / PR HANDOUT

Flood warnings for northern NSW

An active flood watch is already in place for the Namoi and Barwon Rivers in north-west NSW.

The BoM and the SES advise anybody impacted by flooding not to drive, walk, swim or play in floodwaters and to stay away from flooded areas.

More rain on the way for Sydney

As of Monday afternoon, Sydney is predicted to see a rainfall maximum of 25mm on Tuesday, increasing to 45mm on Wednesday and 35mm on Thursday. The rain is expected to taper off slightly on Friday before clearing by the weekend.

“Unfortunately, if you dislike wet and rainy conditions, this weather pattern is likely to persist. Not only in Sydney but across eastern Australia, we’re anticipating above-average rainfall throughout September, October, and November.”

Coldest night of the year

On Sunday night, a dry polar airmass over southeastern Australia, combined with clear skies, resulted in the coldest night of the year so far.