WaterNSW spokesman Tony Webber said they were watching the weather and speaking with the Bureau without increasing the likelihood of causing problems along the Lachlan River.

The Bureau of Meteorology is forecasting falls of between 20 and 40mm in the Wyangala catchment on Friday following rain also forecast for Thursday.

Rain had also falled earlier in the week, with these falls coming on the back of an already wet winter period.

Wyangala storage currently sits at 95 per cent of capacity, with 3000 megalitres a day (Ml/day) being released from the storage since the weekend. 

On Monday releases from the dam were increased to 10,000Ml/day to increase the available airspace ahead of a predicted large rainfall event. 

This is a continuation of the airspace releases started on Tuesday, August 2, by WaterNSW, the State's river system operator. 

These airspace operations involve releasing the ongoing inflows to maintain storage capacity to capture any future significant inflows caused by more rain in the dam's saturated catchment. 

Under the operating rules for Wyangala Dam, airspace releases:

* must factor in downstream conditions so the river remains beneath minor flood level at Forbes and Jemalong, and;

* may only be conducted where catchment conditions and weather forecasts provide a high degree of certainly that the storage will be at full supply level for the beginning of the irrigation season in October. 

In contrast Mr Webber said WaterNSW was confident it had the capacity to absorb the forecast rainfall at Burrendong Dam.

Burrendng Dam is currently sitting at 78 per cent of its capacity.

“We’ve still got about 300,000 megalitre of airspace at Burrendong and are only releasing 50 megalitres a day,” Mr Webber said.

“We’re pretty confident Burrendong will be able to absorb the rain event if it transpires,” he said.