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

Archive of NZ Weather & Climate
Cyclone Tracy
Posts: 2488
Joined: Thu 07/09/2017 19:25
Location: North Shore, Auckland
Has thanked: 771 times
Been thanked: 1719 times

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

Unread post by 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
Posts: 2256
Joined: Tue 10/09/2019 07:20
Location: Waiuku
Has thanked: 706 times
Been thanked: 556 times
Contact:

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

Unread post by Awhituobs »

interesting
tich
Posts: 3466
Joined: Sat 15/03/2003 18:32
Location: Christchurch (St Albans)/Akaroa
Has thanked: 21 times
Been thanked: 91 times

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

Unread post by tich »

TonyT wrote: Tue 01/06/2021 11:59

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
Posts: 18485
Joined: Wed 12/03/2003 22:08
Location: Raukapuka Geraldine
Has thanked: 1769 times
Been thanked: 1412 times

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

Unread post by 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.
JohnGaul
NZThS
Razor
Moderator
Posts: 5120
Joined: Fri 10/02/2006 15:14
Location: Halswell, Christchurch
Has thanked: 717 times
Been thanked: 921 times

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

Unread post by 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
Christchurch Rocks
Chris W
Posts: 1444
Joined: Tue 04/11/2014 18:13
Location: Lyttelton
Has thanked: 947 times
Been thanked: 362 times

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

Unread post by 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.
Locked