The State Emergency Service (SES) has issued 57 flood warnings across New South Wales this morning, extending from the far north to the Victoria border, as well as warnings about possible tornadoes.

Three states bracing for wild conditions
AUSTRALIA-ENVIRONMENT-WEATHER-FLOOD
MUHAMMAD FAROOQ/AFP via Getty Images

It comes after Sydney officially had its wettest year on record yesterday, with 91mm of rain pouring over the city beginning at 9 a.m, as per 9News.

Today, three states are in the crosshairs of the big wet, with southeast Queensland and Victoria bracing for storms and probable flooding as well.

More heavy rain is expected to fall in NSW starting late today, according to SES spokesman Jason Simms, who also confirmed the service is on alert for potential tornadoes.

It comes on the heels of a marine wind warning.

"The SES has preemptively sent workers to various sections of the state inside the possible damaged area," Simms told 9News.

Today, the Bureau of Meteorology (BoM) issued a strong wind warning for the Macquarie, Hunter, and Sydney coasts, as well as the Illawarra, Batemans, and Eden coasts.

Tomorrow, the Sydney Enclosed Waters, Coffs Coast, Macquarie Coast, Hunter Coast, Sydney Coast, Batemans Coast, and Eden Coast will be included.

A trough and a cold front are across the state, generating a low-pressure system.

NSW Minister for Emergency Services Steph Cooke has warned that Saturday will be a "danger day" for Sydney and its environs.

The Bureau of Meteorology has issued dozens of flood warnings for rivers around the state, and residents in impacted regions are encouraged to prepare immediately - before the rain increases.

The SES has issued 14 watches and act notices across the state, with the central and northwestern regions bearing the brunt of the flood risk.

The Darling River in Bourke is expected to reach a moderate flood level (11.40 meters) on October 12 to 14 according to the SES.

The river level might reach 12.00 meters by late October, with further surges possible.

The outback town saw its wettest October day in 67 years, with 45.4mm falling.

According to Weatherzone, the unpredictable weather is coming to an end.

More wet weather for soaked east coast

Over the last two weeks, major flooding has been occurring on numerous inland rivers, and the current rain has added to the already overflowing situation, as per ABC News.

There are still warnings in effect for locations like the Namoi, the Macquarie, the Bogan, the Lachlan, and down to the Murray River, according to Bureau of Meteorology forecaster Jonathan How.

The rivers have already begun to rise, and more rain is predicted in the Sydney area over the next several days.

"We are now anticipating mild to moderate flooding in the Hawkesbury-Nepean regions," Mr. How said.

River levels are predicted to be lower than they were during the disastrous storms earlier this year.

Over the east, the atmosphere remains wet.

Moisture has been rushing down the nation from both sides, forming a massive pool over eastern Australia.

This moisture is caused by the negative Indian Ocean Dipole, which encourages warm seas in the northwest, and the third La Nia in a row, which brings warm waters to the northeast.

One of the key things driving this rain is the moisture that has been lying over the east of the country for quite some time, according to Mr. How.

Meanwhile, in the north, preparations are ongoing, with areas of the Cape and the Top End now suffering mild to severe heatwave conditions.

With all of the overcast, temperatures in the south and east are forecast to be two to five degrees below average, with some regions beneath denser cover dropping to as low as 14 degrees below the October average.

Unfortunately, the cold is anticipated to last throughout next week.

Make the most of the sun on Monday and Tuesday, since Mr. How has warned that another bout of rain is due mid-week.