Looks like La Nina has had a positive effect. The increased cloud cover and the resultant drop in temperature and strong winds have resulted in algae levels dipping below closure level for the past few weeks. With the level still high any prolonged unfavourable conditions can result in another lake closure.
Council have now added toxin concentration to the graph. Previously the lake remained closed for several months although algae levels were below closure level. This addition will now give users the big picture on all aspects that can result in lake closure.