WeatherZone believes the system carrying the rain and storms will not have the intensity or moisture to bring more than just a few millimetres of rain to most places.

The promising band of cloud will do little more than tease those searching for decent soaking rain.

Falls of more than five millimetres will be mostly restricted to the hills and ranges in each state.

Thunderstorms amongst the light rain have the potential to bring isolated falls of up to about 15mm to these parts.

Northern NSW will mostly miss out altogether as will the far north of SA.

Southeastern states have had a reasonable start to autumn after an extremely dry January and February.

Most have had close to their average March rainfall already this month.

This coming rain will add a little more badly needed moisture to the ground.

However, it's still a very dry argument in parts of the Murray-Darling catchment.

Some of the Riverina, Mallee, Riverland and Flats and Lower Basin have had less than 10mm of rain in the last three months.