Another Heavy Rain event - Eastern South Island 20-21st June

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snowchaser01
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Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by snowchaser01 »

Thought I might as well start a thread for this, as MS have issued warnings and watches. 230-280mm for the Kaikoura Coast and Ranges with a watch extending as far south as Amberley. My gut tells me it might even go further south than that.
Anyway, 250mm+ around Kaikoura in less than 24 hours could create some infrastructure problems, so one to watch for sure!
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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by talbotmj15 »

Whats up with CWU calling Advection snow to 400m? Is anyone seeing this at all? Seems unlikely
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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by snowchaser01 »

Metservice modelling is so far wrong it's not even funny. Predicting 0mm of rain in CHCH between now and 6pm, yet look at this heavy and very slow moving band incoming.
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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by Chris W »

In fairness we know they are garbage and the rain maps show a decent fall before 3pm.

Looking further north, the Metservice maps also lessen the intensity for Kaikõura through the night although it's still a sustained period of heavy rain. Just may help with any flood peaks.
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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by snowchaser01 »

Chris W wrote: Sun 20/06/2021 13:23 In fairness we know they are garbage and the rain maps show a decent fall before 3pm.

Looking further north, the Metservice maps also lessen the intensity for Kaikõura through the night although it's still a sustained period of heavy rain. Just may help with any flood peaks.
I always thought the rainfall modelling was directly related to the 3day maps?
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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by melja »

Been persistent rain in waikawa bay Picton for 2 days now, creeks all up and SE wind really starting to blow now. Makes a change living up here with much more dynamic weather than Rangiora

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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by Cantab03 »

snowchaser01 wrote: Sun 20/06/2021 13:24
Chris W wrote: Sun 20/06/2021 13:23 In fairness we know they are garbage and the rain maps show a decent fall before 3pm.

Looking further north, the Metservice maps also lessen the intensity for Kaikõura through the night although it's still a sustained period of heavy rain. Just may help with any flood peaks.
I always thought the rainfall modelling was directly related to the 3day maps?
Yes it does match up with that Josh, it didn't appear to do that today for some reason. Anyways, a good band of rain about to move in here again in Christchurch. 10mm for far today from periods of rain, with drizzle patches in between. Not expecting too much after dark apart from scattered rain or drizzle, so I am guessing what we get in the next 2 or 3 hours will be the bulk of it for the City. The rest largely to the north, especially the Kaikoura Coast.
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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by snowchaser01 »

Cantab03 wrote: Sun 20/06/2021 15:23
snowchaser01 wrote: Sun 20/06/2021 13:24

I always thought the rainfall modelling was directly related to the 3day maps?
Yes it does match up with that Josh, it didn't appear to do that today for some reason. Anyways, a good band of rain about to move in here again in Christchurch. 10mm for far today from periods of rain, with drizzle patches in between. Not expecting too much after dark apart from scattered rain or drizzle, so I am guessing what we get in the next 2 or 3 hours will be the bulk of it for the City. The rest largely to the north, especially the Kaikoura Coast.
Hi Leighton, yea that band has been hanging offshore for a while, now finally coming ashore! Up to 12mm for the day now. This band should add another 15-20mm and as you say, scatter falls for the city after dark with some banking inland.
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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by melja »

145mm so far at my house in waikawa Picton since yesterday with gale winds bringing trees down.

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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by Razor »

snowchaser01 wrote: Sun 20/06/2021 15:27


Hi Leighton, yea that band has been hanging offshore for a while, now finally coming ashore! Up to 12mm for the day now. This band should add another 15-20mm and as you say, scatter falls for the city after dark with some banking inland.
A total of 6mm for us, just enough to be annoying for outdoors pursuits
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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by Awhituobs »

sure was a stuck rain band over Picton area for ages
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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by NZ Thunderstorm Soc »

Seems like this event was mainly a eastern NI event rather than down here.
Lots of rain around the Gisborne area and wind gusts up to 160k/hr reported in Cook Strait today.
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Re: Another Heavy Rain event - Eastern South Island 20-21st June

Unread post by snowchaser01 »

Razor wrote: Mon 21/06/2021 09:20
snowchaser01 wrote: Sun 20/06/2021 15:27


Hi Leighton, yea that band has been hanging offshore for a while, now finally coming ashore! Up to 12mm for the day now. This band should add another 15-20mm and as you say, scatter falls for the city after dark with some banking inland.
A total of 6mm for us, just enough to be annoying for outdoors pursuits
Yea you guys were in the rain shadow of BP.. often get less than nierher areas. At home.. Northwood, we got 30mm.
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