Weatherzone shared satellite images of the weather system writing, “this week’s weather will be a perfect example of how a negative Indian Ocean Dipole (IOD) affects Australia.”
Sharing images of the cloud band, Weatherzone said it is being fed by moisture-laden air from the tropical Indian Ocean.
“This current of tropical moisture is connecting with a mid-latitude low pressure system and an associated cold air mass to create a large, thick band of clouds,” the weather service wrote.
“This type of weather pattern is common during a negative IOD and this is the second cloud band to affect Australia since the negative IOD was declared last week.
“After drenching parts of WA earlier this week, this cloud band will move further east over the next few days producing widespread cloud and rain over parts of all other Australian states and territories.”
A negative IOD was declared last week, and is a driver of wet weather like La Niña.
Rain forecasts suggest up to 30mm of rain could fall over “a wide area of eastern and south-eastern Australia between Thursday and Sunday”.
This could stretch from central Queensland to Tasmania and South Australia.
Numerous flood warnings are already in effect for NSW and Victoria.
Rare flurry of powder snow in Western Australia
BoM defines an IOD as “the difference in sea surface temperatures between the eastern and western tropical Indian Ocean”.