NSW is about to also cop a Winter Heatwave as maximums match those similar to March across the entire State! Above image – temperature anomaly for Wednesday, August 16th via PivotalWeather
A slow moving high pressure system which is expected to take 4-5 days to make its way across NSW is expected to be the main cause of the heat, before a trough moves through the region towards the middle of next week. The high pressure system is likely to help produce clear and sunny conditions which will see temperatures across the entire State increase dramatically. As the trough moves through, at this stage later on Wednesday, North to North-West winds ahead of it will drive temperatures up even more, potentially making it the hottest day of the heatwave for those in the Northern half of the State, while areas behind it will see temperatures gradually drop until below average temps hit the State on Friday.
The Coastline is expected to see the main impacts over Friday and the weekend, as the heat peaks on Friday into the mid 20’s through areas North of and including Wollongong, before easing back over the weekend but still remaining well above average in the low to mid 20’s. Temperatures should start to pick up in the West during Sunday, and for those along the Ranges who will potentially see below average temperatures… the heat is definitely coming.
From Monday onwards, maximums in Western NSW and even North-Western VIC are expected to climb to as much as 8-12ºc above average, with most places sitting around 30-33ºc across Western NSW and into the mid to high 20’s over North-West VIC. Temps should remain well above average along the Coast too, but by Tuesday and Wednesday we could see maximums climbing up to around 10-13ºc above average though Coastal areas North of and including Sydney.
Despite NSW copping the heat badly, VIC should be on the receiving end of constant isolated to even scattered showers which should keep temperatures mostly down. Don’t be fooled by the cool mornings either over NSW, with frost possible most mornings along the Ranges due to clear skies, temperatures should rapidly rise mid morning and rapidly cool each evening.