South Island of New Zealand being pummelled by Australian fire smoke

By using back trajectories we can see 'where that air' came from by using model wind data at 500hPa (yellow line) & 700hPa (red line). This trajectory goes back 24 hours to show how smoke from the Australian bush fires have travelled across the Tasman Sea.^AC pic.twitter.com/REtMNPSxoy

— MetService (@MetService) January 1, 2020