If the average temperature over a year has gone up in Tasmania then the fact that they may have had record low temperatures for a period of time is irrelevant (counteracted by the higher temperatures) and only goes to show that extreme weather, in many cases, is in both temperature directions and is the new norm.
Have you done any high school maths or stats? It is the average temperature, over the course of a year, measured over many years, measured over the entire planet, that is important. We all know that average temperatures over the entire planet are trending up, in line with expert projections.
Have you ever thought that the extra energy in the atmosphere and increasing temperature might change the temperature gradients and cause atmospheric changes that may result in more extremes? This is what they have been predicting, and now we are seeing it.
But you can believe whatever you want to believe due to your ideological persuasion that you are right and the climate experts are all wrong.
P.S. FYI, I am not saying a jet stream is causing this, because I am not an expert (unlike your good self), but there is a jet stream in the southern hemisphere polar region. I'm sure even the experts would need time to analyse the data to determine what has caused this anomaly. One thing is for sure, -12C in Tasmania is not normal!
"Jet streams are fast flowing, narrow air currents found in the atmospheres of some planets, including Earth.[1] The main jet streams are located near the tropopause, the transition between the troposphere (where temperature decreases with altitude) and the stratosphere (where temperature increases with altitude).[2] The major jet streams on Earth are westerly winds (flowing west to east). Their paths typically have a meandering shape; jet streams may start, stop, split into two or more parts, combine into one stream, or flow in various directions including the opposite direction of most of the jet. The strongest jet streams are the polar jets, at around 7–12 km (23,000–39,000 ft) above sea level, and the higher and somewhat weaker subtropical jets at around 10–16 km (33,000–52,000 ft). The Northern Hemisphere and the Southern Hemisphere each have both a polar jet and a subtropical jet. The northern hemisphere polar jet flows over the middle to northern latitudes of North America, Europe, and Asia and their intervening oceans, while the southern hemisphere polar jet mostly circles Antarctica all year round."
