Forecast issued at 4:30 pm EST on Thursday 30 June 2016.
A high pressure system over northeastern New South Wales will shift slowly eastwards into the Coral Sea today whilst weakening. A weak surface trough over the southern interior of Queensland is shifting east and will contract off the southern coast early on Friday. A new high is moving into southwest Australia and is forecast to move slowly eastwards across the south of the continent over the next few days. This high will push dry, cold air across most of the state again over the weekend. A more significant upper trough may develop over Queensland early next week.
Forecast for the rest of Thursday
Fine and clear across most of the state with only the chance of shower near the northeast tropical coast. Light to moderate southeast to northeasterly winds, fresh about the northeast coast, shifting southwesterly from the west behind a surface trough over the interior during the day.
Friday 1 July
The slight to medium chance of showers will persist over the northeastern tropics in an onshore wind flow. Some cloud may extend into the far southern interior though with no rainfall expected. Fine and mostly sunny conditions elsewhere. Early frosts should not be as extensive as Thursday morning due to winds associated with the passage of the trough, however some isolated frost patches are possible in the southeastern interior. Light to moderate southwest to southeasterly winds in the south, tending east to southeasterly elsewhere.
Saturday 2 July
A weak upper trough will continue to move slowly north over the state, while the large high will continue to move eastwards across the south of the continent. Dry, cold air will therefore persist across most of the state with fine and mostly sunny conditions expected apart from some showers about the northeastern tropics in the onshore wind flow. Widespread frosts are likely again about the southern and central interior.
Sunday 3 July
The upper trough will likely move eastwards across the south of the state and weaken further whilst the large high will shift into southeastern Australia. Dry, cold air will persist across most of the state with most parts remaining fine and mostly sunny, apart from some showers about the central coast and northeastern tropics in the onshore wind flow. A weak surface trough may develop over the northeastern interior with a slight chance of afternoon showers. Widespread frosts are likely about the southern and central interior.
Monday 4 July
Another pulse of an upper trough is likely to amplify over central Australia during Monday. Showers may develop across parts of central, southern and eastern Queensland on Monday. Frosts are likely to become confined to the Granite Belt on Monday morning.
Tuesday until Thursday
The upper trough is likely to move eastwards into Queensland on Tuesday and into the southeast of the state on Wednesday before contracting offshore. Showers may continue across parts of eastern and southern Queensland on Tuesday before clearing offshore in response to the new upper trough during Wednesday, however there is uncertainty surrounding this forecast at this stage.
The next routine forecast will be issued at 4:30 am EST Friday.