"Areas of heavy rainfall, which may lead to flash flooding, are expected to accompany the low as it shifts slowly southwards over the northwestern interior during the next 24 hours," BoM's severe weather warning read.

"Damaging winds may occur near the low. Isolated locally destructive winds are also possible with thunderstorms.

"The heaviest rainfall is occurring over the northwestern interior between Mount Isa and Cloncurry.

"Locations which may be affected include Winton, Mount Isa, Cloncurry, Julia Creek, Boulia and Dajarra."

Fire and Emergency Services Minister Craig Crawford said two swift water rescue crews and two SES flood boats had been sent to Winton and Longreach, in the state's north-west.

“There has already been heavy rainfall in some areas, and with predictions of isolated falls of up to 300 millimetres, QFES personnel are monitoring the situation closely," he said.

“Certainly, this rain is welcome and while there has been no major impact at this stage, plans and personnel are in place to support local communities if required.

“As always, it is important for people in that area to be vigilant and stay away from flood water.

"If you’re driving through the affected areas, be alert for the potential for roads to be flooded and, as always, remember: If it’s flooded, forget it.

“Residents should avoid travelling unless it’s absolutely necessary. If you do have to travel, let people know where you’re going and pack accordingly because there is potential for you to become isolated.

“Take enough supplies to last several days, including items such as water, food and changes of clothes.”

South-east Queensland was not expected to be impacted by the low-pressure system, but a wet week was forecast.

An upper trough was expected to intensify through central Queensland and start to move into the south-east.

Mr De Morton said the trough was expected to cause instability around the south-east. Brisbane could see showers on Saturday with the slight chance of a thunderstorm in western suburbs.

The chance of rain was expected to increase from there, with showers and storms expected on Sunday, making way for patchy rain on Monday.

Mr De Morton said from Tuesday onwards the chance of showers was predicted to drop, but remain on the cards until Friday.

From Monday onwards, the top temperatures in Brisbane were expected to drop to 25-27 degrees into next weekend.