Forecast issued at 4:30 am EST on Monday 26 September 2016.
A ridge of high pressure develops over the southern interior through today. A weak surface trough will move across the far southeast this afternoon and off the coast this evening. A weak upper trough and associated patchy cloud band approaches the southwest of the state late today, pushing into central western Queensland on Tuesday. A more significant trough will begin to impact southwestern Queensland on Wednesday.
Forecast for the rest of Monday
A slight chance of light showers over the northern Peninsula today while patchy light rain will develop in the far southwest during the late evening. Mostly fine elsewhere in the state. Temperatures in the far south west will be well below average, while warm conditions are expected in the northeast. Light to moderate southwest to southeasterly winds, tending east to northeasterly, fresh at times, along the east coast during the afternoon and evening.
Fire Danger - Very high for the Northern Goldfields and Upper Flinders.
Tuesday 27 September
The weak upper trough will progress northwards towards central Queensland with the associated cloud band clearing from the south. Some patchy rain or showers will occur through the central west, with the heaviest activity expected through the northern Channel Country. Mostly fine conditions are expected elsewhere with only a slight chance of showers about Cape York Peninsula. Cooler than average through the interior of the state.
Wednesday 28 September
A new, more significant upper trough and associated surface trough are expected to approach the southwest of the state late in the evening. Some showers and patchy rain areas are possible for much of the state south of about Normanton to Cairns, with the exception of the southeast. A chance of a gusty thunderstorm in the southwest of Queensland near and to the east of the approaching surface trough.
Thursday 29 September
The trough system will propagate eastwards across the state with a medium to high chance of showers and thunderstorms developing to the east of Boulia to Thargomindah and clearing through remaining areas in the central and southern interior during the day. The far northern tropics will be mostly unaffected by this system resulting in a mostly fine and sunny day. Cold conditions will dominate in the wake of the trough.
Friday until Sunday
The upper trough is expected to clear the east coast early on Friday morning with fine and cooler conditions for most of the state on Friday and Saturday after its passage. Just a slight to medium chance of shower activity redeveloping about the tropics on Saturday and Sunday. The next upper trough may approach the far southwest of the state on Sunday with the chances of showers, patchy rain and thunderstorms increasing in the southwestern districts on this day. Temperatures remaining cooler than normal in much of the interior on Friday before warming on Saturday and Sunday as winds tend northerly ahead of the next trough system.
The next routine forecast will be issued at 4:30 pm EST Monday.