A minor flood warning for the Macquarie River at Wellington Bridge and Warren is in place, the NSW State Emergency Service (SES) said on Sunday morning.
Releases from Burrendong Dam have been reduced due to the expected rainfall.
Minor flooding had eased at Wellington Bridge, where the river peaked at five metres about 9pm on Saturday night.
The Bell River at Wellington peaked below minor flood level.
Downstream at Warren, minor flooding was occurring where the river was slowly rising towards a peak on Sunday afternoon, the NSW SES reported.
Dam outflows would continue to be adjusted to maintain space for future rainfall events.
The Macquarie River at Dubbo was expected to remain below minor flood level.
At Warren it was predicted to peak near 7.8 metres on Sunday afternoon with minor flooding closing Wambianna Road at the Reddenville Break.
The Bureau of Meteorology has recorded 20.2 mm of rain has fallen at Dubbo on Sunday to midday.