In NSW, residents can expect storms, dangerous winds and even hail as the day progresses.
“Severe thunderstorms are possible across much of the east and north today, likely near the Blue Mountains, western Sydney and the Hunter,” the bureau said.
“Gusty winds, heavy rain and large hail are possible.”
In parts of Queensland’s north, similar conditions are set to lash the Peninsula and Gulf Country.
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“Thunderstorm forecast for Friday 23/12. Severe thunderstorms with heavy rainfall are possible in western Queensland and parts of the Peninsula and Gulf Country,” the bureau said.
Sydney skies darkened, a warning of the sudden storm to come
Meanwhile in Victoria, Melburnians can expect a mostly fine day with a slight chance of showers and wind gusts this afternoon.
In South Australia, residents will enjoy warm temperatures and sunny skies with tops of 25C.