Wettest autumn in decades delivers much needed respite for farmers

Victoria and NSW are basking in a wet autumn that's likely to extend into the winter months

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There is a good chance of above average winter rain falling across many areas of Victoria and NSW, following wetter than average autumn conditions.

There is a good chance of above average winter rain falling across many areas of Victoria and NSW, following wetter than average autumn conditions.

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Much of Victoria and NSW are having a wet autumn and farmers are looking forward to more rain this winter.

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Most areas of Victoria have enjoyed above average rainfall so far this autumn, and it is only parts of the far east that have not been so lucky - with drier than usual conditions experienced.

It is a similar story for New South Wales, with above average rainfall across the interior.

But, east of the Divide, seasonal rainfall totals to date have been more typical - or even below average in some regions.

March and April did the 'heavy lifting', with rainfall being in the wettest 10 per cent on record across much of south eastern Australia (away from the coast) during April.

This came on the back of above average rainfall for much of the same area during March.

Across the state, autumn rainfall is on track to be the highest since 1989.

The first five months of 2020 have been wet for most of Victoria, but year-to-date totals are closer to average in the far north west, south west and eastern corners of the state.

Extra cloud cover has helped to keep autumn days cooler than average for most parts - and much cooler than average in areas of the north east.

On average, overnight temperatures have mostly been typical for the season across Victoria.

The outlook for winter is still favouring above average rainfall, showing greater than 70 per cent chance for much of the state's central, northern and north western regions.

In the south west and south east areas, there is a roughly equal chance of above or below average winter rain.

The prospect of extra rainfall and cloud cover means days are likely to be cooler than average this winter in the north west.

But there are signs that days could be warmer than usual in the east-a pattern that extends along the eastern seaboard - from parts of Tasmania up to the tip of Cape York Peninsula.

One of the main drivers of this year's above average rainfall has been warmer than average water in the eastern Indian Ocean providing extra moisture to weather systems as they sweep across the country.

Looking ahead, computer models are predicting that a negative Indian Ocean Dipole (IOD) may develop during winter.

While the El Nino-Southern Oscillation (ENSO) is likely to remain neutral during winter, a cooling towards La Nina levels is possible by the end of the season.

Both La Nina and negative IOD events typically bring above average rainfall for parts of Victoria.

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