The Australian Bureau of Meteorology says La Nina conditions have strengthened slightly over the past month with some, but not all, atmospheric and oceanic indicators intensifying. The majority of dynamical models surveyed by the Bureau suggest the central Pacific Ocean is likely to continue to cool over the next few months with a return to neutral values by the southern hemisphere autumn (March-May). All models predict the event will peak in the southern hemisphere summer (Dec.-Feb.).
"La Niña periods are usually, but not always, associated with above-normal rainfall during the second half of the year across large parts of Australia, most notably eastern and northern regions. Daytime temperatures are typically cooler than average and tropical cyclone risk for northern Australia increases during the cyclone season (November-April)," says the Bureau.