Update: BOM spokesperson says high rainfall to hit after May
THE Northern Rivers can expect above average rainfall and temperatures coming into winter as El Nino's effects come to an end.
The Bureau of Meteorology announced in its May-July outlook there was also a 50% chance La Nina will form this year.
La Nina follows El Nino, and it is associated with cooler than average sea surface temperatures in the central and eastern tropical Pacific Ocean.
BOM senior climatologist Agata Imielska said the Northern Rivers should expect wetter weather, particularly in June and July, but it was too early to point to flooding.
"In terms of flooding, yes that risk is part of our climate, but it really comes down to particular weather conditions," she said.
"If we do end up in a La Nina in 2016 though it will increase our risk of widespread flooding."
The last La Nina events occurred back-to-back in 2010-2012, bringing record rainfall to Australia.
The BOM outlook for May-July this year showed there was a 75% chance of above average rainfall in our region and a 60-70% chance of warmer temperatures.
Nights are 80% more likely to be warmer in winter.
Ms Imielska said La Nina's weren't associated with thunderstorms, hail or strong wind events.
"Thunderstorms are very localised events so La Nina doesn't have a strong influence ... La Nina brings more rainfall and, at the severe end, we do tend to get more tropical cyclones," she said.
NSW SES said that residents should keep these weather patterns in mind and prepare homes now to avoid storm damage in the winter.