Heavy fog blanketed much of South East Queensland this morning, with forecasters labelling it the thickest cover seen all year.
The low-lying cloud hung over Brisbane city, spreading as far west to the Lockyer Valley and Scenic Rim.
Hours after the fog lifted, much of inner Brisbane was then blanketed in a dust cloud moving over the city from the southern inland.
The Bureau of Meteorology (BOM) said the dust had come all the way from north-eastern South Australia, carried by winds behind the cold front.
Earlier in the day, passengers at Brisbane airport were warned to expected delays, with "operations slowed for safety" and at least 12 flights were delayed out of Brisbane airport.
Half a dozen flights were also cancelled — largely due to delays in Sydney, where heavy winds have reduced flights to one runway.
It prompted BOM forecaster Michael Knepp to warn commuters to be wary on the roads.
"It is probably the thickest fog I have seen in Brisbane so far this year," he said.
Ferry services including CityCats and ferries from Bulimba to Teneriffe, Kangaroo Point and New Farm Park were all suspended, but had resumed by late morning when the fog had burned off.
Brisbane then experienced an unusually hot winter day with a top temperature of 28.6 degrees Celsius recorded in the CBD.
But Mr Knepp said the warmer weather would be short lived, with more typical winter weather set to resurface by Tuesday morning.
"With temperatures in the low 20s, those mornings when we wake up are definitely going to feel like winter with temperatures struggling to get into the teens," he said.ABC