Meridian Energy is continuing to spill water from the Waitaki hydro system.
Yesterday, spokeswoman Michelle Brooker said a northwest front was forecast this weekend, which would mean more rain.
It was a case of waiting to see what happened and monitoring the situation. Spilling began after Christmas, due to heavy rain.
Yesterday, the Waitaki River was flowing at 800cumecs, compared with 1110cumecs the previous day.
Pukaki and Tekapo were both still spilling and were down to 80cumecs and 150cumecs respectively.
It was intended to reduce that over the next few weeks, but it was all weather dependent, Ms Brooker said.
"If we get a couple of fronts come through and get lots of water, that could be an issue," she said, adding people should still watch for rising lake and river levels.
• On the Clutha River, Contact Energy is still spilling water at the Clyde dam.
Contact generation manager Graham Quinn said 900cumecs of water was being spilled daily. The amount peaked at 1400cumecs on December 28, before it dropped to about 1000cumecs on January 2.
Further rain increased inflows to about 1300cumecs on January 3, Mr Quinn said.
How long water will be spilled would depend on the weather.
A similar amount of water is being spilled at Roxburgh dam.
