From Adelaide to Brisbane, all capitals are on target for their hottest day of spring so far, from Wednesday in the south to Friday in the east.
Heat building over central Australia will surge to the coast from Adelaide round to Brisbane in the middle of this coming week ahead of a gusty cool change.
Adelaide will reach into the mid 30's for the first time since March with gusty and dry northerly winds. This day will be at least five degrees hotter than any day so far this season.
Melbourne and Hobart will have their warmest days since April on Wednesday, but the heat won't be nearly as pronounced as in Adelaide because the hottest air mass won't be overhead until night time. This will bring both cities quite a warm night into Thursday morning when the change arrives.
Sydney will face the heat on Thursday when it has a good chance to experience its hottest day since it endured the 46 degree scorcher back in January. But before then it has to endure today's heat in the low to mid 30's.
Canberra won't be one to miss out on the heat either with Thursday likely to hit 28 degrees, the hottest since March.
On Friday the heat will peak over Brisbane ahead of a gusty change. The set up is almost identical to the one arriving tomorrow with the mercury reaching the low-to-mid 30's in the city and a couple of degrees hotter further west. A weak seabreeze should limit heating slightly, but it will also bring in extra humidity. One of these days are likely to be the hottest since the mercury nudged 35 degrees in January.
Once this heat has cycled round the nation it will continue to build over central Australia under clear skies, ready to make an even hotter journey to the coast in the coming weeks.
© Weatherzone 2013
12:38 EST Tropical Cyclone Jack has rapidly developed over the warm waters of the Indian Ocean in the past 24 hours, making it the 10th system to be named this season.