Flood watch issued for Qld, NSW

NEW South Wales and Queensland is facing a drenching with 50mm to 100mm of rain expected in some parts.

A Bureau of Meteorology rain chart, posted by the State Emergency Service in NSW, shows heavy rain of more than 50mm falling in parts of southern and western Queensland and along the east coast of Australia.

In a Flood Watch advice, BOM said rain and thunderstorms was expected across southern inland Queensland and northern New South Wales through to Wednesday.

"Rainfall totals up to 80 mm are possible across the catchment area with isolated heavier falls with thunderstorms.

"River level rises above the minor flood level are possible in the Macintyre Dumaresq, Weir and Moonie River catchments.

"Heavy rainfall may also lead to localised flash flooding.

"Catchments at risk within the Flood Watch area include the Macintyre, Dumaresq, Weir and Moonie Rivers including Macintyre Brook.


 Higgins Storm Chasing, in its update on Tuesday, said rain was beginning to fall over western and southern Queenland.

 "In the 24hours to 9am Tuesday good widespread rainfall reports of 10 to 20mm have filtered in from inland parts of the state.

"This is only just the start with much more widespread rain and isolated storms to come across Western, Southern and Central inland districts.

"Most places average around 20mm for the entire month of August and this system has the potential to deliver up to 5 x that."

The weather bureau has spoken of 50mm of rain on the Gold Coast and warned there could be some thunderstorms.

There have also been big seas warnings for the Sunshine Coast and the Gold Coast.

"There is potential for more than 60 millimetres," Brett Dutschke, senior meteorologist at Weatherzone, told Fairfax Media.

"The heaviest period is most likely [Wednesday] afternoon and evening."

Higgins said the heaviest rain on Tuesday is likely fall through the North West, Channel Country, South half of the Central West, Maranoa and Warrego, Darling Downs and Granite Belt and possibly the South East Coast late.

"Basically South of a line from about the Sunshine Coast to Dalby to Longreach to Mt Isa is where 25mm is likely and 50mm is possible. Isolated storms may also occur over these regions with heavy rain and strong winds.

"Early Wednesday the system shifts East early in the day with the heaviest rain being focused through the South East Coast, Darling Downs and Granite Belt, Southern Central Highlands and Coalfields and the Central West districts. So say South and West of Gympie to Emerald. Again 25mm is likely and 50mm is possible."

"Places through the Central East will also get some rain and the odd storm during Wednesday early Thursday but at a much more reduced amount than others.

"The Capricornia, Wide Bay and Burnett, remaining Central Highlands and Coalfields and Central Coast could pick up around 15mm from this system."

Fine weather is expected to return on Thursday when the system shifts off the East Coast of Queensland.