A monster 4,000km rain bomb is set to smash Australia over the next 48 hours – with weather experts predicting the most intense downpour in decades.
Wet weather is forecast for two thirds of the nation, with the current November rainfall at unprecedented levels.
A number of states are already on flood watch, as swollen rivers are poised to rise leading into the weekend as a band of rain and storms push east.
On Wednesday, Brisbane residents endured their wettest November day in two decades along with flash flooding.
Sky News Weather meteorologist Alison Osborne said the rain monster will span a massive 4,000km area, stretching from the Northern Territory through to Queensland.
A monster 4,000km rain bomb is set to smash Australia over the next 48 hours – with weather experts predicting the most intense downpour in decades (pictured, a car trapped in Wallacia in NSW)
Queensland’s deluge this week has been the heaviest rainfall recorded in 40 years
It will then head southeast before hooking west to South Australia.
‘Heavy falls are likely to continue on Thursday,’ she said.
‘At the same time the low front will then march into NSW and the ACT, with widespread showers and storms likely to intensify throughout the afternoon.’
Very humid north-easterly winds are tipped to drive showers on shore, with residents in Brisbane, the Sunshine Coast and Gold Coast advised to arm themselves with umbrellas.
‘The storm threat is very widespread. Stretching from the Northern Territory through to the southeast,’ Ms Osborne told news.com.au.
‘Localised severe storms could bring heavy rainfall, but we also can’t rule out strong gusts and large hail particularly through Western NSW and Central Queensland.’
If the wet weather wasn’t daunting enough, muggy conditions are also predicted across much of Australia.
Thankfully a welcome cool change should reach Sydney by Friday afternoon and Brisbane by Saturday.
This is likely to see the rain and storms pushed offshore by the end of the weekend.
But before blue skies emerge, parts of NSW have been left reeling after record rainfall this week.
Orange in NSW’s Central Tablelands has seen its highest monthly rainfall since records began in 1870 with a total of 243.2mm recorded as of Tuesday – and there’s still a few days left to round out November.
Condobolin and Cowra, in the state’s central west, have also seen their heaviest deluge this month with 131.7mm and 173.2mm of rain falling respectively.
The Bureau of Meteorology has warned almost every state will be drenched in rain, before things finally brighten up from Monday.
Weather experts have predicted the majority of Australia will be engulfed by wet conditions leading into Sunday
A tweet from the BOM in Queensland warning residents about testing conditions forecast for November 25
SES crews were seen using a life raft to make it through floodwaters in Gunnedah, NSW this week
Meteorologist Jackson Browne said the wild weather was a result of ‘two tropical air masses’ that are set to collide in the wake of cyclone Paddy which formed near Christmas Island.
He predicted Thursday would be the ‘peak’ day for heavy rainfall across the eastern parts of the country.
‘Widespread falls of 25mm to 100mm with higher amounts of thunderstorms are likely,’ he said.
‘Rainfall should extend along the east coast of Australia on Friday with conditions beginning to fine up for at least most of NSW and Victoria on Saturday.’
Victoria was also hit with the heavy downpour as flood warnings were issued for parts in the state’s east while Canberra was also hammered with rain.
Western Australians and Tasmanians will be the only ones around the country to enjoy a warm and sunny rest of the week.
The wild weather comes after the BoM declared on Tuesday a La Nina event is underway in the Pacific.
A flooded street is seen in Forbes (pictured) in central west NSW after heavy rainfall lashed the area this week
An SES worker rescued two boys stuck in fast moving floodwaters in the Lachlan River, NSW earlier this week
Dr Andrew Watkins, the BoM’s Head of Operational Climate Services, said that typically during La Niña events, rainfall becomes focused in the western tropical Pacific, leading to wetter than normal period for eastern, northern and central parts of Australia.
‘La Niña also increases the chance of cooler than average daytime temperatures for large parts of Australia and can increase the number of tropical cyclones that form,’ he said.
‘La Niña is also associated with earlier first rains of the northern wet season, as we’ve observed across much of tropical Australia this year.’
The last significant La Nina was back from 2010–12, which saw widespread flooding in some areas.
AUSTRALIAN CAPITAL CITY WEATHER FORECAST THIS WEEK
Thursday: 19-26 degrees and showers
Friday: 19-24 degrees and showers
Saturday: 15-20 degrees and possible showers
Sunday: 15-21 degrees and possible showers
Thursday: 16-18 degrees and rain
Friday: 12-17 degrees and possible showers
Saturday: 10-19 degrees and mostly sunny
Sunday: 9-19 degrees and mostly sunny
Thursday: 21-27 degrees and showers
Friday: 22-27 degrees and possible thunderstorms
Saturday: 21-28 degrees and possible showers
Sunday: 20-25 degrees and possible showers
Thursday: 27-35 degrees and possible thunderstorms
Friday: 26-34 degrees and possible thunderstorms
Saturday: 26-33 degrees and showers
Sunday: 25-35 degrees and possible showers
Thursday: 17-32 degrees and sunny
Friday: 19-33 degrees and sunny
Saturday: 20-34 degrees and sunny
Sunday: 19-33 degrees and sunny
Thursday: 14-22 degrees and mostly sunny
Friday: 12-20 degrees and mostly sunny
Saturday: 10-22 degrees and mostly sunny
Sunday: 11-23 degrees and sunny
Thursday: 15-21 degrees showers and showers
Friday: 13-18 degrees and showers
Saturday: 7-17 degrees and cloudy
Sunday: 7-19 degrees and mostly sunny
Thursday: 14-18 degrees and possible showers
Friday: 9-14 degrees and cloudy
Saturday: 8-16 degrees and mostly sunny
Sunday: 8-20 degrees and mostly sunny