March Monsoon Season West Coast 25-6 March

Andy · Unread post by **Andy** » Tue 26/03/2019 08:03

193mm at Milford Sound since midnight!

Nev · Unread post by **Nev** » Tue 26/03/2019 08:11

Impressive, but don't think these falls are really too unusual for Milford Sound.
Below are a few stats from NIWA's manual site since records began around 1930.

Milford Sound Rainfall (mm)
6716 … Mean Annual Rainfall
9259 … Highest Annual Rainfall (2016)
1917 … Highest Monthly Rainfall (Oct 1988)
651 … Highest 48 hr Rainfall (Jan 1994)
538 … Highest 24 hr Rainfall (20 Jan 1994)
368 … Highest 12 hr Rainfall (26 Mar 1978)
235 … Highest 6 hr Rainfall (26 Mar 1978)

Razor · Unread post by **Razor** » Tue 26/03/2019 09:30

Some big numbers coming in on the West Coast Regional Council sites and ECAN. 24 hrs as at 6am:

Haast River: 360mm
Cropp: 299mm
Hokitika Rv at Colliers: 348mm (8am)
Whataroa Rv at Highway: 240mm
Mt Cook: 157mm

The event is going to linger most of today at those sites, in fact it may just be winding up for them.

Looks like Milford has gone offine

Chris Raine · Unread post by **Chris Raine** » Tue 26/03/2019 09:56

Spillover rain in Western Southland .Raining heavily now 10.8mm/hr

RWood · Unread post by **RWood** » Tue 26/03/2019 10:00

Nev wrote: ↑Tue 26/03/2019 08:11 Impressive, but don't think these falls are really too unusual for Milford Sound.
Below are a few stats from NIWA's manual site since records began around 1930.

Milford Sound Rainfall (mm)
6716 … Mean Annual Rainfall
9259 … Highest Annual Rainfall (2016)
1917 … Highest Monthly Rainfall (Oct 1988)
651 … Highest 48 hr Rainfall (Jan 1994)
538 … Highest 24 hr Rainfall (20 Jan 1994)
368 … Highest 12 hr Rainfall (26 Mar 1978)
235 … Highest 6 hr Rainfall (26 Mar 1978)

And its 12-month record of 10015mm for June 1957-May 1958 ...Cropp's 299mm for 24 hours is fairly routine, but of course the 48- and 72-hour tallies may be more interesting ...

Razor · Unread post by **Razor** » Tue 26/03/2019 10:39

RWood wrote: ↑Tue 26/03/2019 10:00 Cropp's 299mm for 24 hours is fairly routine, but of course the 48- and 72-hour tallies may be more interesting ...

Yes, this event is only just getting started in the Cropp. 364mm as at 9am for the event

Razor · Unread post by **Razor** » Tue 26/03/2019 11:54

Latest WCRC data

Haast River at Roaring Billy 409mm as at 10:46am

Mt Cook Village from Ecan 325mm for event so far. So significant spillover to the plains I'd say

Waiho River at Franz is insanely high

https://www.facebook.com/coastersclub/v ... nt_mention

Chris W · Unread post by **Chris W** » Tue 26/03/2019 12:26

That's a powerful river alright, kudos to those who engineer that bridge!

RWood · Unread post by **RWood** » Tue 26/03/2019 12:50

Looking at Cropp Waterfall on the WRC site - 613.5mmm for the 24 hours to 11.06am - 645mm from the start of the 25th.

Edit: now 721 mm from the start of 25/3. I don't think its 48-hour record of 1062mm is under threat yet, but wait and see.

Razor · Unread post by **Razor** » Tue 26/03/2019 14:07

Jeepers. Biggest event in 20 years for Milford Sound I'm hearing

Chris Raine · Unread post by **Chris Raine** » Tue 26/03/2019 15:50

West Coast Civil Defence has activated

Razor · Unread post by **Razor** » Tue 26/03/2019 15:54

Looks like even more signficant falls coming ashore right now

NZ Thunderstorm Soc · Tue 26/03/2019 17:12

Chris W wrote: ↑Tue 26/03/2019 12:26 That's a powerful river alright, kudos to those who engineer that bridge!

just heard that the bridge has gone now.

Bradley · Unread post by **Bradley** » Tue 26/03/2019 17:37

Yep half of Waiho Bridge at Franz Josef has been washed away, those West Coast bridges are designed to handle ALOT of water as well

melja · Unread post by **melja** » Tue 26/03/2019 17:45

This bridge is kind of designed to be washed away, that's why it's temporary style bridge on steel piles and not a concrete structure.

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NZ Thunderstorm Soc · Tue 26/03/2019 17:47

I bet those people who were standing on the bridge, earlier, were glad they weren't on when the bridge finally gave in to the pressure of the water flowing under it.

snowchaser01 · Unread post by **snowchaser01** » Tue 26/03/2019 17:51

There is an incredible video emerging of it being washed away. And whether it is designed to go or not... it still takes a huge amount of strength to do it.

Chris W · Unread post by **Chris W** » Tue 26/03/2019 17:53

Holy smokes, I wasn't expecting that.

Willoughby · Unread post by **Willoughby** » Tue 26/03/2019 17:57

snowchaser01 wrote: ↑Tue 26/03/2019 17:51 There is an incredible video emerging of it being washed away. And whether it is designed to go or not... it still takes a huge amount of strength to do it.

Is there a link anywhere?

snowchaser01 · Unread post by **snowchaser01** » Tue 26/03/2019 18:05

Willoughby wrote: ↑Tue 26/03/2019 17:57
snowchaser01 wrote: ↑Tue 26/03/2019 17:51 There is an incredible video emerging of it being washed away. And whether it is designed to go or not... it still takes a huge amount of strength to do it.
Is there a link anywhere?

https://www.facebook.com/jacob.schonber ... 3106044033

This should work. Insane!!

Captain Salty · Unread post by **Captain Salty** » Tue 26/03/2019 18:16

Looks like the evening ChCh to Hokitika flight couldn't land.

NZ Thunderstorm Soc · Tue 26/03/2019 18:39

snowchaser01 wrote: ↑Tue 26/03/2019 17:51 There is an incredible video emerging of it being washed away. And whether it is designed to go or not... it still takes a huge amount of strength to do it.

It's what they call a "Bailey Bridge" designed to give way in conditions like this but can be easily put back once the waters recede. There are one or 2 bridges like this on the West Coast.

tornado · Unread post by **tornado** » Tue 26/03/2019 19:26

shocking storm. lucky there was warnings. so yeah

RWood · Unread post by **RWood** » Tue 26/03/2019 19:30

Cropp update: 878mm from 00:00 25th to 17:24 26th; 822.5 of that from 13:00 25th, 50mm in the hour to 5pm today. If similar intensities of 25mm+ per hour continue to 3am or so the record 1062mm for 48 hours will go.

Thunder081 · Unread post by **Thunder081** » Tue 26/03/2019 20:36

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March Monsoon Season West Coast 25-6 March

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