Hello, Miriam at the Bureau with your National Weather Forecast for the weekend, Saturday the 22nd of November, with a quick look ahead at Sunday the 23rd of November as well. We'll start though by taking a look at Saturday's weather map. Low pressure troughs are continuing to move across the continent tomorrow. We've got one lying through the east, another moving through central areas and a third across the west. These low pressure troughs are expected to generate showers and thunderstorms across parts of southern and eastern Australia tomorrow. In the north, Tropical Cyclone Fina continues to move south-west across the western coast of the Top End, moving to the north of Darwin. We are likely to see heavy rainfall, damaging to destructive winds and possible flooding. Elsewhere across the country, heat will be building this weekend, particularly through central and eastern areas, with heatwaves starting to develop as well.

Let's take a state-by-state look at tomorrow's forecast now, starting with Queensland. In Queensland tomorrow, that low pressure trough lying across inland parts of the state will generate thunderstorms and a few showers once again across parts of central and south-eastern Queensland. Storms tomorrow are likely to be fairly isolated and non-severe, but we could still see some locally moderate falls or gusty winds with any of that activity. Elsewhere, it will be mostly dry and sunny. Temperatures will be hot, with heatwaves developing through the north-west and inland parts of the state. Brisbane tomorrow can expect a shower or two and a top of 29 °C.

In New South Wales tomorrow, the low pressure trough lying across inland parts of the state will generate areas of showers and thunderstorms to the east. Those thunderstorms will mainly impact the eastern inland and north-east, pushing out towards the coast. For Sydney, the Illawarra and the South Coast, we’re more likely to see showers and rain areas rather than thunderstorms. Some storms in other areas could tend severe, particularly across the Central and Northern Tablelands and some of the Slopes and Plains. Heavy rainfall is the greatest risk, bringing a hazard of flash flooding. For Sydney tomorrow, showers are expected through the day with a top of 23 °C.

Down in Canberra, showers will increase with a top of 21 °C.

In Victoria tomorrow, there is a chance of morning fog through the east, then cloud building and showers developing, pushing down from the east and in from the west. Showers should be fairly isolated through most of the day but will increase later on, particularly across central parts of Victoria and through the east, with some more moderate rainfall possible late in the day going into early Sunday. For Melbourne, showers are expected to increase through the day with a top of 23 °C.

In Tasmania tomorrow, there is a chance of morning fog or frost with another cool morning. Then we’re in for a mild, dry and mostly sunny day, with a little cloud developing across the north and a very slight chance of a shower. For Hobart, we’re looking at a mostly sunny to partly cloudy day with a top of 19 °C.

In South Australia tomorrow, showers and thunderstorms will move through, mainly impacting central and eastern parts of the state. They will be fairly scattered and no severe storms are expected, but moderate rainfall is possible in some areas. Heat will start to build across South Australia, particularly inland and central parts. Temperatures will remain slightly below average through the south-east. For Adelaide tomorrow, a shower or two is expected with a top of 25 °C.

In Western Australia tomorrow, showers and thunderstorms will develop across the far south-west as the low pressure trough moves through. Some severe storms are possible, with risk of damaging winds or large hail. Perth may see a thunderstorm or two, otherwise partly cloudy conditions in the south, sunnier inland, and heat building inland with heatwaves starting across parts of the North and Interior.

For the Northern Territory tomorrow, Tropical Cyclone Fina will move through the Van Diemen Gulf, passing north of Darwin. Showers, thunderstorms, heavy falls, flooding and damaging to destructive winds are likely for parts of the Top End. A Severe Weather Update video for Tropical Cyclone Fina is available for full details. Elsewhere across the Territory tomorrow, hot conditions will continue through central and southern areas, with heatwaves starting to build.

Looking ahead at Sunday, Tropical Cyclone Fina will continue moving south-west away from Darwin towards the Kimberley Coast. Wet, stormy, windy weather may affect northern Western Australia. Low pressure troughs through the east and central areas will continue generating thunderstorms. From south-east Queensland through eastern New South Wales into Victoria, showers and thunderstorms are likely, with a chance of severe storms, particularly in New South Wales. Drier thunderstorms may affect a central band of the country moving towards the south-west. The south-west corner is likely to see the least rain. It will be cool along the west coast and in the north under the influence of Tropical Cyclone Fina, but most other parts of Australia will have a warm day, with temperatures building through central and eastern areas and into the south-east, with heatwaves developing further north.

Detailed weekend forecasts are available on the Bureau's website, the BOM Weather app, and via social media. Have a good weekend and we'll catch you next time.