COMMUNITIES located in the Narromine and Warren LGAs have been warned to be aware of possible flooding after moderate to heavy rainfall in the Macquarie River catchment.

After peaking at midday today (Tuesday 5 July), the Narromine shire is only expecting minimal inundation, while Warren has already closed one of their roads in preparation for rising waters.

The peak of the Macquarie River began at Wellington, peaking at 5.74m on early Monday morning and had dropped to 4m by Monday (4 July) afternoon.

That peak continued to Dubbo, reaching 6.94m metres on Monday afternoon before dropping to 5.5m by that afternoon.

Narromine Shire Council Mayor Craig Davies said the river peaked along the northern outskirts of Narromine earlier today and, while it was the highest he had seen in a long time, was not considered a major concern.

"It reached a peak here of 9.1m at about midday, which is considered a very minimal flood level, and it is already starting to fall so Narromine should be alright," Cr Davies said.

"At this stage, we're not sure what will happen at Gin Gin, however given that 67,000 came through Baroona and more is coming from the Talbragar, it is likely that it will be a high river."

Cr Davies advised residents living in and around the Gin Gin area should therefore make sure they remain aware of the current water flows and contact the local SES if they require assistance or more information.

In the meantime, all unsealed roads in the shire have been closed until further notice to prevent risk to motorists.

Some parts of the shire have also experienced significant rain in recent days, causing local flooding, especially in areas closer to the Bogan River.

Further downstream, the Macquarie River near the Warren township was expected to exceed its minor flood level of 7.5m earlier today.

Forecasts from the Bureau of Meteorology say the river level is likely to exceed the moderate flood level of 8.5m by early tomorrow morning on (Wednesday 6 July) with the possibility of a major flood peak of 9m throughout the day.

Warren Shire Council staff and the Warren SES unit are already preparing for these water levels.

Warren Shire Council Mayor Milton Quigley said while the organisations were taking any potential dangers to the community seriously, the situation was considered manageable.

"During the November/December flood event, we reached a peak of 9.47m which was handled comfortably," Cr Quigley said.

"So for the people within the town, we have all the appropriate procedures in place to keep things under control, including starting to close the floodgates.

"We aren't doing them all at once because if any rainfall happens and there's no way for the water to escape, that will flow back into the town almost like a fishbowl."

Outside the town, Warren emergency services have advised owners of any low-lying properties along the Macquarie River to move their stock to higher ground as soon as possible to mitigate risk.

The council have also closed the Wambianna Road at Reddenville Break, about 10km north of town, due to excess water flowing onto the road from the nearby river.

Warren SES Unit Commander Sam Midgley said their latest measurement indicated the water level on the road was about 1.7m by mid-Tuesday afternoon.

"Fortunately the local community knows it is already impassable so we don't usually have issues with people attempting to drive through floodwaters," Ms Midgley said.

"However, we urge anyone who sees any other roads flooded to not drive through them. It's the best way to keep everyone safe, as well as us, safe."

According to Cr Quigley, there was a chance the Ellengerah Road and Bundemar Roads may also be closed, if the slight trickles of water spotted along these roads earlier today continue to rise.

In the coming days, Cr Davies and Cr Quigley said they will still be keeping an eye on the local river levels as excess flows from the Burrendong Dam, located upstream from Wellington, are released to prevent any potential future flood issues.

"The river at Burrendong has risen from about 107 per cent capacity to over 127 per cent, equivalent to about 300,000mL of water," Cr Davies said.

"I'm part of a group which monitors the flows from the Burrendong and we will be meeting tomorrow to look at releases.

"It's important that the flow rate drops off as slow as can be managed. The last thing you want is the river to be regularly going up and down because that will cause significant damage to the bank."