Large Rain Event Canterbury and high altitude snow. 29-31st May 2021

[Cyclone Tracy]

4 weeks to the day before this event, the Jetstream became abnormal on the equator above NZ from a potent Kelvin wave.

viewtopic.php?p=199975#p199975

[Awhituobs]

interesting

[tich]

There were several 100mm+ events over several days in the mid 1970s also. I doubt its a record 2 day fall, but its certainly getting up there.

77mm recorded in 24 hours at Chch Airport on 3rd July 1977.

http://www.nzlii.org/nz/other/nz_gazette/1977/94.pdf (go to page 2409)

[NZ Thunderstorm Soc]

If I get some spare time, I will pull out my weather diaries to see and find of significant weather events for ChCh/Canterbury'
I can remember events where the Heathcote River flooded in to the Clarendon/Richardson Terrace areas around the Opawa railway bridge from the tides that backed into the Heathcote River from the estuary in heavy rain events mostly from the east.

[Razor]

Mt Hutt reports 40cm rain affected snow at the lower field level, but up to 4 metres in drifts further up the mountain wow

[Chris W]

One bright side of this phenomenal event is that finally there is a beautiful cap of snow on the Seaward Kaikouras. Hopefully it's pretty thick as well, so possibly might last through winter.