La Nina gearing up to drop big downpours this summer warns BOM

GOOD TIME FOR DUCKS?: The Bureau of Meteorology is predicting heavy rains and possible floods across eastern Australia this summer.
GOOD TIME FOR DUCKS?: The Bureau of Meteorology is predicting heavy rains and possible floods across eastern Australia this summer.

No, La Nina hasn't snuck off despite the dry November and will dump heavy rain across eastern Australia this summer, according to the Bureau of Meteorology's latest climate outlook report.

BOM's head of operational climate services Dr Andrew Watkins said Australia was continuing to experience an active La Nina event which was expected to remain until at least the start of autumn.

This meant large parts of eastern Australia had an increased risk of flooding, he said.

"While the last three weeks have been dry in many parts of the country - due in part to unfavourable tropical weather patterns - it does not signal a weakening of La Nina.

"Our climate outlook is the opposite of what we experienced last year in Australia. This summer, NSW, Victoria and Queensland are expected to see above average rainfall, meaning we face an increased risk of widespread floods."

But Dr Watkins said while the risk of bushfires wasn't as high as last summer, fires would occur.

"There's a great chance of grass fires in some areas as recent rain and warm weather have led to vigorous vegetation growth.

"South-eastern Australia is one of the most fire-prone regions in the world. Even short periods of hot and dry weather increase the risk of fire in summer."

Dr Watkins said the outlook was also a reminder for communities to be prepared for heatwaves over the coming months.

"Every summer we see heatwaves across southern Australia. This summer heatwaves may not reach the extreme temperatures of recent years, but may be longer duration and more humid, which can still have a significant impact on human health.

"Daytime temperatures in summer are likely to be near average, but there will be periods of high heat combined with milder periods.

Dr Watkins said Northern Australia remained on track for an average to slightly above average cyclone season.

"On average, Australia sees 9 to 11 tropical cyclones each year, with four crossing the coast. The first cyclone to develop in the Australian region occurs earlier during La Nina years.

"People in the north of the country should prepare for tropical cyclones now. And don't forget tropical lows, which can bring heavy rainfall, flooding and cause significant property damage."