Just an amazing illustration of moisture advection (transport of moisture) from the sub-tropics and tropics to the South Island of New Zealand.

This is the fuel for the heavy rain for the west of the South Island with flooding a real concern along/west of the Alps.

~Chris pic.twitter.com/IZTuYL9uZG

— NIWA Weather (@NiwaWeather) 7 de noviembre de 2018