Forecast issued at 4:30 am EST on Wednesday 1 June 2016.
An upper trough over central Queensland will move east through today, shifting off the east coast tonight. Meanwhile, a more substantial upper trough will amplify over southeastern Australia from Thursday and move across southern Queensland during Friday and Saturday. A high near Tasmania will move slowly eastwards into the Tasman Sea in the coming days, extending a firm ridge along the east coast.
Forecast for the rest of Wednesday
A medium to high chance of showers and patchy rain over the central interior and Central and Capricornia coasts. Isolated thunderstorms are also possible over the central and southern interior. Slight to medium chance of showers across the remaining eastern districts and parts of the northwest and southern interior. Mostly fine and partly cloudy about the Gulf coast. Slight to moderate southeast to northeasterly winds, fresh at times over the far northern coast.
Thursday 2 June
The initial upper trough will shift further east and begin to weaken as the next major upper trough starts to develop in the Great Australian Bight. Slight to medium chance of showers over the south of the state, tending to patchy rain later in the far southwest. The high shifts a little further southeast in the Tasman Sea, with showers pushing onto the east coast in the onshore flow.
Friday 3 June
The upper trough is expected to amplify over southeastern Australia with a thickening cloud band in the interior of the state. Showers with rain areas and possible thunderstorms are expected to increase in the interior, especially in southern inland districts ahead of a surface trough that will move into the far southwest of the state during the day. The Tasman Sea high will move closer to New Zealand maintaining the east coast ridge across northern Queensland and a slight chance of showers. Meanwhile, winds along the southern east coast will tend more northeasterly in response to the approaching inland surface trough with a subsequent increase in shower activity.
Saturday 4 June
The upper trough is expected to move across eastern and central districts during day and clear off the east coast late in the day. Areas of rain, showers and isolated thunderstorms will contract east during the day as a surface trough shifts east in response to the movement of the upper trough. A drier and cooler air mass will move in behind the trough's passage. Mostly fine conditions are likely across the northern tropics with only a slight to medium chance of showers about the eastern tropical coast.
Sunday until Tuesday
As the upper trough moves into the Coral Sea and weakens, another trough may move across southeastern Australia increasing chances of showers across far southern districts on Sunday and Monday. Fine and mostly sunny are likely in central and northern districts apart from a slight chance of shower along parts of the east coast. An upper ridge will move into the state on Tuesday leading to fine and sunny conditions across most of the state.
The next routine forecast will be issued at 4:30 pm EST Wednesday.