Parts of Queensland's east coast and inland to the Darling Downs are experiencing severe storms and isolated supercells, which may produce "giant hail" and "flash flooding".
At 12:30pm, the Bureau of Meteorology (BOM) issued a warning for damaging winds, large hailstones and heavy rainfall for Gympie, Somerset, Western Downs, South Burnett and Toowoomba Council Areas.
An earlier BOM warning was issued for similar conditions in Wide Bay and Burnett, Darling Downs and Granite Belt and parts of Central Highlands and Coalfields, Capricornia, Maranoa and Warrego and Southeast Coast Forecast Districts.
"Severe thunderstorms are quickly becoming more extensive across South East Queensland," the BOM said.
BOM forecaster Felim Hanniffy said the storms had "high-end severe potential with these systems".
"You're talking the trifecta — large hail, damaging winds and heavy rainfall," Mr Hanniffy said.
"There's potential for some of these storms to have destructive wind gusts, giant hail and very, very heavy rainfall."
It comes after wild weather lashed eastern parts of Australia over the weekend, resulting in power outages in Queensland, rockslides on Sydney's beaches and flash flooding in New South Wales.
Mr Hanniffy said the dangerous conditions would most likely develop around central and south-east districts during the afternoon and early evening.
"Probably the Wide Bay-Burnett and inland of the Sunshine Coast area will be a particular focal point for the really nasty stuff," he said.
"Really, it's the type of day where all areas about the south-east will be a risk to at least some kind of severe storm activity."
Mr Hanniffy said there would a risk of severe weather again tomorrow, but conditions would stabilise later in the week.
It will be an anxious wait for households in the south-east still cleaning up after wild weather on Sunday.
'There's a tree in your roof'
When a severe hailstorm tore through the Ipswich suburb of Chuwar on Sunday, local resident Mark Bataev was at the park with his dog.
"About a minute into it, my neighbour called me, 'There's a tree in your roof'," Mr Bataev said.
"I couldn't help but laugh.
"I got home, went inside and found a bit of a gum tree through the roof and into the lounge room.
"You can see the sky straight out through [the roof].
"If it had come down while I was standing there, it could have been a different story, but it's lucky I wasn't home."
Mr Bataev said SES volunteers covered the hole in the roof, but the damage had cut off all the lights in the house.
At the height of Sunday's storm chaos, 33,000 homes and businesses were without electricity after power lines came down.
Mr Bataev said the experience had given him a taste of the state's wild weather.
"It's the biggest storm I've been in — I moved up to Queensland last year and it's the first time I've experienced something like this," he said.ABC