Forecast issued at 4:30 am EST on Wednesday 26 April 2017.
A weak high pressure system in the Tasman Sea will drift slowly eastwards today and tomorrow, with the ridge along eastern Queensland weakening as a result. A moist and unstable airmass will remain over the far north of Cape York Peninsula and over Torres Strait for the next few days. An upper trough and associated surface trough over southern Queensland will shift north and east across southern districts today. A new high over the Great Australian Bight will then extend a firm ridge and a cool, dry air mass into much of the state on Thursday and Friday in the wake of the surface trough.
Forecast for the rest of Wednesday
A medium to high chance of showers and storms over Torres Strait and northern parts of Cape York Peninsula. A slight to medium chance of showers and possible storms about the southeast quarter of the state east of about Thargomindah to Longreach, increasing to a medium to high chance east of about Cunnamulla to Charleville. Showers and storms are expected to clear from the west during the day, moving off the far southeast coast during the evening but remaining about the Wide Bay district into the late evening. The slight chance of showers about the north tropical coast. Fine and mostly sunny elsewhere. Some patchy morning fog is possible about eastern parts south of about Townsville. Mostly moderate northeast to northwesterly winds about eastern parts, tending southeast to northeasterly over the north of the state. Moderate to fresh and gusty south to southwesterly winds over western parts, extending eastwards during the day.
Thursday 27 April
The showers and storms over the northern Peninsula district should start to contract northwards as a drier air mass extends northwards. The chance of some light showers about parts of the east coast in the early morning as the surface trough shifts offshore. In the wake of the trough, the large high pressure system over the Great Australian Bight will push a dry, cool air mass into much of the state, with fine and cooler conditions for most areas.
Friday 28 April
The chance of some showers about the northeast coast, more likely about the north tropical coast. Fine and mostly sunny for the remainder of the state, with cool to cold conditions expected. Some light frost patches are possible about the southern Darling Downs and Granite Belt, as well as about parts of the central interior.
Saturday 29 April
The large high remains slow-moving over the Great Australian Bight, with dry and cool conditions expected to continue over much of Queensland. A slight chance of coastal showers about the north tropical coast as well as the chance of showers and storms about northern parts of Cape York Peninsula. Some light frost patches are again possible about parts of the southern and central interior.
Sunday until Tuesday
The large high pressure system over the Great Australian Bight should maintain the fine and cool conditions over much of the state through the outlook period, although some showers are possible about parts of the exposed east coast, more likely from Monday as the flow becomes a little more onshore. Showers and possibly some storms may return to parts of the interior on Tuesday depending on the movement and evolution of the next trough system.
The next routine forecast will be issued at 4:30 pm EST Wednesday.