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Brisbane, Sydney, Perth weather: Forecast for ‘widespread drenching,’ up to half a meter of rain

A significant rain event is set to hit with up to half a meter of rain leading forecasters to be worried about one major town in particular.

A “widespread drenching” is on the cards over the coming days as a significant rain event wallops the country’s east coast.

Western Australia could also see heavy rain as a large band of moisture heads in from the Indian Ocean.

But it’s in the east where falls of up to 500mm – half a meter – could be seen as a vicious weather system passes through.

Sky News Weather Meteorologist Rob Sharpe said while it was a large event, he had worries about one town in particular.

“I’m concerned about Rockhampton because it is a place which does see big floods overall.

“We’re anticipating widespread moderate riverine flooding, and I think that’s going to include Rockhampton.

“It’s only a small chance this stage to reach major flood levels – it’s not quite as big an event as what we had back in 2017. But you can’t rule it out with this type of weather system.”

Rockhampton is looking at 50-100mm on Wednesday, 30-80mm on Thursday and up to another 30mm on Friday.

Mr Sharpe said a good chunk of that rain could “spill down” into New South Wales and Victoria too.

The Bureau of Meteorology has stated “dangerous and life threatening flooding” is possible across large areas of Queensland. Two thirds of the state are on flood watch.

Queensland set to be smashed with rain

A strong frontal system is tapping into tropical moisture over Queensland setting in motion the current rain event.

Wednesday could see 50-90mm fall on Cairns in stormy conditions with 120-200mm for Townsville in just 24 hours. Some inland areas will also have severe thunderstorms.

“Around Townsville, Mackay and Rockhampton there’s widespread rain totals of over 200mm and the potential that we could see over 500mm for this event” said Mr Sharpe.

Mackay is currently forecast to top out at as much as 250mm on Wednesday and then another 50m on Thursday.

Brisbane won’t miss out with 35-60mm on Wednesday and up to 45mm for Thursday and Friday. Temperatures are likely to hit 22C on Wednesday reaching 24C on Friday.

Event to spread into NSW, Victoria

“This event also spreads into NSW, particularly the inland areas, which will see some of the heaviest rain,” said Mr Sharpe.

“The Murray Darling Basin as a whole is looking at a widespread drenching which will continue to elevate flows.”

Bourke, in the state’s north west, could record between 30-60mm on Wednesday and another 35mm on Thursday with Cobar looking similar.

Falls of up to 35mm are possible in Dubbo and Wagga on Thursday. Rain also for the state’s north east but less heavy than other regions with a few falls in Ballina on Wednesday and then 8-20mm on Thursday and up to 15mm on Friday.

Warm and wet in Sydney with highs of 23C reaching 27C on Saturday and lows of 17C. Up to 8mm in the gauge on Wednesday and then some heavy falls on Thursday with 10-20mm due.

Canberra could see a heavy day of rain on Thursday with up to 25mm coming down. Showers can be expected throughout the rest of the week. Temperatures in the highs teens in the capital knocking on the twenties on Friday and dipping below 10C overnight.

Across the Victorian border and Wangaratta is in the firing line on Thursday with 15-25mm of rain possible. The ski resorts are also looking wet as well as central parts of the state.

It will be cloudy and 20C in Melbourne on Wednesday as the clouds gather and then up to 10mm of rain falling in Thursday with less on Friday. There will be lows of 10-14C ​​at dawn in the city.

A few showers for Hobart but far less heavy than on the mainland. Mainly dry until Friday when there could be a few spots with Saturday seeing up to 10mm. Maximums in the late teens for the rest of the week and minimums rising from 6C on Wednesday to 14C on Sunday.

Highs of 21C in Adelaide and 11C overnight. A cloudy end to the week with light showers on the weekend.

Western Australia to be hit by heavy rain, too

As the east coast is pummeled, it will be wet in the west, as a rain band rapidly approaches Perth. Little in the way of moisture on Wednesday but Thursday could be damp with 20-30mm falling on the city and a bit of a top up on Friday too. The midweek high of 22C will fall to 18C for Friday with lows of 9-11C.

Port Hedland will be warm and 31C with a possible storm on Friday bringing showers.

Mostly clear in Darwin topping out at 33C with temperatures going down to 25C after dark.

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