Sky News Weather declares La Nina weather driver now underway

Sky News Weather Meteorologist Rob Sharpe has declared Australia's fourth La Nina in five years is underway. Speaking to Sky News Australia, Mr Sharpe discussed the declaration. "The main reason why is because I think that all of the requirements needed for La Nina are here," Mr Sharpe said. "We've got the cool waters in the middle of the Pacific Ocean and reacting to that is the atmosphere."