Yet another extreme heatwave is forecast to sweep South-Eastern QLD and Central QLD this week, making this the third since New Year for 2017. This one is expected last at least 4 days with excessive prolonged heat, and at times humidity, baking the region.
During Wednesday, a surface trough is forecast to become established along or just East of the South-East QLD and Central Coast Ranges. This surface trough is forecast to draw in hot West to North-West winds towards the backside of it, and very warm and humid North-East winds on the Coastal side of it. These will combine with a hot air mass overhead to produce widespread temperatures of 5-10ºc above average.
During Thursday, a cool change is forecast to move up the South-East QLD and Wide Bay Coastline’s bringing some brief relief in the afternoon, but not before temperatures rapidly rise into the mid 30’s again. This cool change however is not expected to influence the Capricornia or inland regions a whole lot as temperatures remain baking.
Friday, and the surface trough is forecast to come back into play but this time a little further West. This will allow coastal regions to be slightly cooler (still sitting in the mid 30’s by the way) but unfortunately with those North to North-East winds cranking in… it’ll be very humid and feel a whole lot hotter than what it really is.
Saturday, the trough moves towards the Coast once again and allows those very hot winds to crank in over the entire South-East quarter of the State and potentially will allow Saturday to be the hottest day of the bunch with widespread maximums in excess of 38ºc. A cool change is once again likely to move up the Coast but may only reach the Sunshine Coast before midnight and Gympie by sunrise the next day.
Each day, thunderstorms are a chance, these have a chance of locally breaking the heat so that overnight minimums are somewhat bearable, but overnight humidity is expected to be ripe and still create sticky, uncomfortable conditions. This is once again a reminder to look after pets, the elderly, children, pregnant woman and those who are sick as they will suffer the easiest from heat stress.