With two passes from NOAA 18 this morning, the coloured infrared highlighting precipitation enhancement from each pass can be combined to produce a single image.
To do this, we need to project each pass onto a flat surface since the earth is a sphere, which accounts for the slightly unusual shapes of the combined passes. This makes the two images not quite perfectly aligned, plus near the overlap area some of the clouds have moved a bit in the 98 minutes between the two passes.
With the weather front which brought all the rain over the long weekend now well to the east of New Zealand, this is about to be replaced by another front with rain for most of the country from tomorrow.
The wet weather which was over the central, southern part of the South Island has intensified and is now causing heavy rain on the coast as it moves eastward.