A storm blasting Antarctic weather over New Zealand is currently the biggest storm on earth according to WeatherWatch.
The low stretches from just south of Fiji to Antarctica's ice shelf, but only 20 per cent of the storm is affecting New Zealand.
Snow surrounding the Shotover River in Queenstown. Photo / Supplied
WeatherWatch.co.nz said the forecast air pressure at its centre over the next 24 hours would be greater than that of Hurricane Katrina when it made landfall in 2005.
Weather expert Philip Duncan said, "It's fairly normal to get a cold snap in late May. We're less than a week away from winter, it's not surprising to get a blast like this."