The Castlereagh Highway near Coonamble was closed at around 11am today (Sunday 28 September) as the Castlereagh River overflowed near 'Nine Pines' around 14 kilometres south of the township towards Gulargambone.

The Traffic Management Centre of Transport for NSW has advised that the highway is closed in both directions.

Local resident Veronica Chandler was watching as the water began to cross the road.

*Veronica Chandler calls the local SES to report the water breaking out across the highway.

"It only took a couple of minutes to get across," she said.

"It was flowing pretty fast but there were people still driving through it at 70 or 80 kilometres an hour."

The water is expected to cut across and join the Warrena Creek. If waters reach 2010 flood levels, the Baradine Road may be cut just east of the Warrena Creek bridge.

In Coonamble itself, while the levee bank is doing its job, water is overflowing on the western side of the river at the area known as The Cutting and running along the Limerick Street Gully, crossing Pages Terrace, as commonly occurs when the river is high. The street IS NOW CLOSED.

*A panoramic view of where the gully crosses Pages Terrace in West Coonamble earlier today.

*Pages Terrace in Coonamble is now closed. This photo taken just before 1pm Sunday 28 November, heading north from Coonamble Bowling Club.

At Gulargambone, water has now dropped below the bridge on the Gular-Quambone Road.

Water inundated the Lions Park opposite the Post Office and Hospital but has subsided quickly.

*Floodwaters in Lions Park Gulargambone at around 8am on Sunday 28 November. PHOTO COURTES: R Standfield

• Debris remains on the bridge at Gulargambone after flood waters dropped. PHOTO COURTESY: R Standfield.

Police are asking motorists to stay out of floodwaters. Click here to see their message - If it's flooded, forget it.