But, it turns out that yesterday's clear pass is one of the best on record.
"Actually, this is just about the longest pass we can ever get across the islands. If we have a pass from the west coast to the east coast that lasts about 30 seconds," @ISSAboveyou replied.
A satellite view of the whole country posted by the Met Service shows how cloud-free the skies over NZ were. The Met Service posted "A west to southwest flow brings clear skies to much of Aotearoa today, which makes it easy to view the fresh snow that has fallen on Tongariro National Park and the Southern Alps."
With cloud and rain forecast for much of the South Island this week it looks like the ISS crew got lucky indeed.