Weather: Fears grow over new cyclone forming as ex-TC Kirrily causes flash flooding and 300mm falls – while the rest of Australia bakes in heatwave conditions

Parts of Australia still reeling from an ex-tropical cyclone are bracing for a similar system forming on the coast – while southern parts of the country are set to swell as the weather bureau issues a new heatwave warning.

Just over a week after ex-tropical cyclone Kirrily made landfall off the North Queensland coast, another cyclone – tropical low 06U – began forming near K’gari (formerly Fraser Island) on Friday.

The weather system is currently a weak subtropical low, but the weather bureau predicts that the system will intensify by Wednesday or Thursday next week.

“A weak subtropical low 06U is moving northeast in the eastern Coral Sea off the Australian region,” the bureau said.

‘The most likely scenario is for 06U to start moving west across the Coral Sea towards the north coast of Queensland next week.’

Parts of Queensland are bracing for another possible cyclone, with tropical low 06U (pictured) already forming not far from the north coast of Queensland.

Parts of Queensland are bracing for another possible cyclone, with tropical low 06U (pictured) already forming not far from the north coast of Queensland.

Weatherzone also believes the cyclone will spend at least a week in waters near the Coral Sea before tracking west towards the Queensland coast.

While meteorologists remain uncertain whether the system could become a tropical cyclone, if the system does upgrade it will be the third tropical cyclone to hit Queensland in two months after Kirrily and Cyclone Jasper, which made landfall in December.

The latest weather forecast comes as the Sunshine State was hit with more than 300mm of rain in some regions in the 24 hours to 9am on Friday, due to the remnants of TC Kirrily sweeping northern parts of the state.

A Bureau of Meteorology has warned that the system is likely to bring heavy rainfall leading to flash floods in the western parts of the Gulf Country, North West and Channel Country Districts.

More heavy rainfall with rainfall totals exceeding 300mm will hit some regions, while wind gusts of up to 110km/h are also expected as part of a devastating combination of extreme weather.

Northern parts of the country face the prospect of more flooding, including 300mm in some places, as the remnants of ex-tropical cyclone Kirrily move across the region (pictured)

Northern parts of the country face the prospect of more flooding, including 300mm in some places, as the remnants of ex-tropical cyclone Kirrily move across the region (pictured)

“Isolated six-hour totals between 150 and 200 mm are possible with 24-hour totals exceeding 300 mm,” the bureau warned.

Flood warnings are also in place in several rivers, including the Flinders, Nicholson and Leichhardt rivers with many catchments approaching capacity.

Local residents and authorities are already facing devastation in the state’s north-west as Kirrily eventually weakens before tracking across northern NSW by Tuesday.

Roads were cut off by floodwaters while trees were uprooted with some towns, including Mt Isa, without fresh food for a week.

Roads were cut by floodwaters while trees were uprooted (pictured) after ex-tropical cyclone Kirrily

Roads were cut by floodwaters while trees were uprooted (pictured) after ex-tropical cyclone Kirrily

Local residents and authorities are already facing devastation in the north-west of the state after ex-tropical cyclone Kirrily as they brace for another threat from a tropical cyclone (picture a flooded road in Queensland)

Local residents and authorities are already facing devastation in the north-west of the state after ex-tropical cyclone Kirrily as they brace for another threat from a tropical cyclone (picture a flooded road in Queensland)

Parts of Australia are set to swell with scorching conditions expected in southern parts of the country (photo beachgoers in Sydney)

Parts of Australia are set to swell with scorching conditions expected in southern parts of the country (photo beachgoers in Sydney)

Meanwhile, some parts of Australia, including the southern parts of the country, are set to swelter through scorching conditions with temperatures in parts of WA set to push past 40 degrees.

Penrith in Sydney’s west will reach highs of 39C on Sunday while Canberra and Melbourne will reach highs of 35C and 37C respectively.

Sydney will reach a maximum of 35C on Monday.

A severe heatwave warning remains in place over the weekend and into Monday for several parts of NSW, including the mid-north coast, the Illawarra and the south coast.

Authorities urged people to keep cool by staying in the shade, drawing blinds and curtains during warmer parts of the day, and using an air conditioning system if available to reduce heat stress.

The warm weather certainly provides ideal conditions for beachgoers (photo beachgoers in Sydney)

The warm weather certainly provides ideal conditions for beachgoers (photo beachgoers in Sydney)

A heatwave warning has been issued for several parts of NSW (pictured weather map of areas across the state expecting high temperatures)

A heatwave warning has been issued for several parts of NSW (pictured weather map of areas across the state expecting high temperatures)

Four day capital forecast

SYDNEY

Sunday: Partly cloudy. Min 21 Max 32

Monday: Partly cloudy. Min 25 Max 35

Tuesday: Shower or two. Min 23 Max 28

Wednesday: Shower or two. Min 20 Max 25

BRISBANE

Sunday: Showers, possible storm. Min 19 Max 29

Monday: Shower or two. Min 19 Max 28

Tuesday: Shower or two. Min 19 Max 29

Wednesday: Sunny. Min 20 Max 29

ADELAIDE

Sunday: Partly cloudy. Min 24 Max 32

Monday: Partly cloudy. Min 23 Max 32

Tuesday: Shower or two. Min 24 Max 33

Wednesday: Shower or two. Min 24 Max 32

MELBOURNE

Sunday: Sunny. Min 16 Max 37

Monday: Shower or two. Min 18 Max 21

Tuesday: Partly cloudy. Min 16 Max 21

Wednesday: Partly cloudy. Min 14 Max 22

PERTH

Sunday: Partly cloudy. Min 15 Max 27

Monday: Sunny. Min 14 Max 28

Tuesday: Sunny. Min 16 Max 31

Wednesday: Sunny. Min 20 Max 36

HOBART

Sunday: Showers. Min 16 Max 22

Monday: Shower or two. Min 15 Max 22

Tuesday: Shower or two. Min 13 Max 20

Wednesday: Becoming cloudy. Min 10 Max 22

CANBERRA

Sunday: Mostly sunny. Min 15 Max 35

Monday: Shower or two. Min 21 Max 29

Tuesday: Showers easing. Min 18 Max 26

Wednesday: Partly cloudy. Min 13 Max 22

DARWIN

Sunday: Possible shower. Min 28 Max 32

Monday: Partly cloudy. Min 28 Max 32

Tuesday: Partly cloudy. Min 28 Max 33

Wednesday: Possible shower. Min 25 Max 32