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Auckland low - storm and flooding


crimsone
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Posted
  • Location: New Zealand
  • Location: New Zealand

    Bit of a nightmare over here in Auckland at the moment, as if Level 4 lockdown wasn't enough to be dealing with. I've seen reports of flood waters rising up literal meters in some parts of west Auckland.

    Seems that a breakaway low from the Tasman has drifted westward, and with nowhere to go is just sitting over the upper North Island. Quite where it's getting it's energy from I don't know, but winds are gusting up to about 90 kph, and the rain's been coming down in the region of 10 mm an hour for the past 8 or 9 hours.

    The total dam volume of Auckland's potable water has risen about 4% in those 8 hours, which given the state of them might be welcome if it weren't in such a flash... that works out to about an additional 3.9 gigaliters of extra water in them over the last 8 hours. The Waitākere dam is probably the smallest of them with a total capacity of just 1.76 GL... and, well, that added 20% to its volume in, at most, 4 hours since this all started.

    It just isn't stopping, and will probably go on for a good few hours more yet.

    1268639466_Screenshot2021-08-31at4_43_09AM.thumb.png.5f8ed888af4a7c1f521a3e47ec51eacd.png870966168_Screenshot2021-08-31at4_55_35AM.thumb.png.d28d895ee1652297c8d71e154b28ae7e.png1348141276_Screenshot2021-08-31at4_55_59AM.thumb.png.153be02f77703afa7cdc7fa2eac9d3c6.png2112458411_Screenshot2021-08-31at3_55_42AM.thumb.png.d36e65ada3c002daa4d4577854462487.png

     

     

     

     

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    Posted
  • Location: Bramley, Hampshire, 70m asl
  • Location: Bramley, Hampshire, 70m asl
    1 hour ago, crimsone said:

     

    Thanks for this Crimsone......looks like my sister in Titirangi would be getting wet if she was going out anywhere. At least the lockdown is keeping most people at home.

    Are you in Auckland or elsewhwre?

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    Posted
  • Location: New Zealand
  • Location: New Zealand
    6 hours ago, Kiwi said:

    Thanks for this Crimsone......looks like my sister in Titirangi would be getting wet if she was going out anywhere. At least the lockdown is keeping most people at home.

    Are you in Auckland or elsewhwre?

    I'm in west auckland... but living right up the side of a valley I'm pretty much uneffected, save for a neighbors tree that's blown down over my fence.

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    Posted
  • Location: New Zealand
  • Location: New Zealand

    The Waitākere area dams have gone from an average of 60-something percent full to 94% full in the last 24 hours. The'd previously been struggling to add as much volume as was being drawn down.

    To put it in context, their total capacity is 17.16 GL. Just under a third of that volume was filled today... and that's not including the volume added to the system in the much larger Hunua ranges dams.

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