Several flood warnings have been issued for a state which is already affected by heavy rains in the past one week.
More flooding is expected in parts of southern Queensland as La Nia grapples with storms, rain and hailstorms off Australia’s east coast.
The Bureau of Meteorology issued several flood warnings for central and southern Queensland on Sunday, including major flood warnings for McIntyre and Dumaresque, Condamine and Balone, and Dawson and Warrego.
Meteorologist Shane Kennedy said the focus was on the Condamine and Balone catchments, with the northern Darling Downs at risk of being submerged.
He warned that isolated rain and thundershowers were expected across much of the state on Sunday afternoon with possible strong thunderstorms, heavy rain, destructive winds and large hailstorms in southern Queensland.
That storm system will move into the southern interior and western Queensland on Monday.
Meteorologist Felim Hanifi said there would be no relief until at least Thursday or Friday, when northern Queensland becomes a “focal point” for rain.
He said the wild weather was a result of the La Nia weather phenomenon.
The major climate driver has seen heavy rain and thunderstorms lash much of eastern Australia over the past two months, resulting in flooding of the Lachlan River catchment in the NSW central west.
Former fire chief Greg Mullins told a Climate Council briefing on Friday that there was “great concern” among emergency management personnel about this summer’s La Nia weather event.
“The problem at the moment is the frequency of events and the amount of precipitation,” he said.
“We are now in a situation where, particularly in Queensland and New South Wales, the catchment and soil cannot take up as much moisture.
“Any more rain just pours over the top, fills creeks, rivers, dams, and they gain capacity and then you get a river flood.”
NSW can expect “unstable weather” to progress during the new week as an inland trough deepens, with wet and stormy weather forecast over much of the state until the trough moves offshore during the latter part of the week.
Victoria will see warmer temperatures on Monday, with Melbourne expected to top 28 degrees.
But the mercury will drop on Tuesday as a trough is bringing rain and cooler temperatures are rising over western Victoria on Monday evening.
The Meteorological Bureau says that this La Nia event is likely to continue until at least the end of January 2022.