#OzWatch: Rare "Stratospheric polar vortex" grips South and East Australia. Jeremy Zakis, New South Wales. #FriendsofHistoryDebatingSociety https://theconversation.com/antarctic-heat-wild-australian-winter-whats-happening-to-the-weather-and-what-it-means-for-the-rest-of-the-year-236067 1919 Sydney