Hide tide or low tide in the morning?

Discussion in 'Community Discussion' started by goodtimes5, Jun 6, 2006.

  1. goodtimes5 macrumors 6502a

    goodtimes5

    Joined:
    Apr 4, 2004
    Location:
    Bay Area
    #1
    I tried googling this question, but too many obscure links. So I came to my number two best place for information.

    So, is it high tide or low tide in the morning?
     
  2. kretzy macrumors 604

    kretzy

    Joined:
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    Location:
    Canberra, Australia
    #2
    I'm pretty sure it's all variable depending upon the position of the earth with respect to the sun and moon. So there's no way of really associating high or low tide with morning and night.
     
  3. UKnjb macrumors 6502a

    UKnjb

    Joined:
    May 23, 2005
    Location:
    London, UK
    #3
    Hi from the UK
    Interesting question! I've just looked up some tide tables here and attach a representative one (from Dover) for today.

    View attachment 49739

    It seems that the majority of obvious morning tides are High Water, with one every seven days (corresponding to the about-noon tide HW) being a Low Water.

    Having said that, my bath this morning is not very full - hmmmm. :)

    Hope this helps.
     
  4. goodtimes5 thread starter macrumors 6502a

    goodtimes5

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    Bay Area
    #4
    Wow, who would've thought it was a weekly pattern?
     
  5. CanadaRAM macrumors G5

    CanadaRAM

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    On the Left Coast - Victoria BC Canada
    #5
    Technically, you have both a high and a low tide each morning (midnight - Noon) and a high and a low each afternoon.evening (Noon- Midnight) but since the lunar cycle is not an even 12 hours, the cycle time creeps around the clock

    http://en.wikipedia.org/wiki/Tide

    http://en.wikipedia.org/wiki/Tide_clock

    The pattern is WAY longer than weekly, because you have both the Lunar (12.4 hours) and the Solar (12 hours) tides, plus the distance between the Earth and moon and the Earth and the Sun constantly vary.

    Because of the local sea depth and geography, the height, lag behind the moon, and interval between tides is different at every location on Earth.
     
  6. D34th macrumors regular

    Joined:
    Apr 14, 2006
    Location:
    Connecticut
    #6
    Yeah, it's not that simple of a question. CanadaRAM is right. I work on an island/boat so I have to know the tide everyday and even include information about it in the tours I give. Where I am, Long Island Sound, CT, the tide period is 6 hours and 12 minutes. This means that it will be high tide, and then 6 hours and 12 minutes later, it will be dead low. So as you can see, the 12 minutes there throws off the whole even schedule which results in different times everyday!
     
  7. reh macrumors 6502a

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    Arkansas
    #7
    It's probably also worth noting that both the full moon and the new moon cause extremes in both tides.
     
  8. MacNut macrumors Core

    MacNut

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    Location:
    CT
    #8
    Every 6 hours and 12 minutes the tide changes, so its not always the same every day. As the moon waxes and wanes the hight of the tide will change. It all works on the magnetic pull the moon has over the ocean.
     
  9. Poeben macrumors 6502

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    Jul 29, 2004
    #9
    It also has a lot to do with the geography of the land. For example, in the case of an inlet it will take a certain amount of time for the water to enter/exit the inlet. This can cause a bay or other such body of water to have a tide that is different from the ocean time by several hours.
     
  10. ExMachina macrumors newbie

    Joined:
    Jun 7, 2006
    #10
    I would think Low, because High tide is at night and due to the moon.







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  11. quigleybc macrumors 68030

    quigleybc

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    Beautiful Vancouver British Columbia, Canada
    #11
    Canada RAM, is there anything you don't know?

    u da man..:D
     
  12. MacNut macrumors Core

    MacNut

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    Jan 4, 2002
    Location:
    CT
    #12
    There really isn't a pattern, It is constantly moving. A high tide today will be about 45 mins later tomorrow. So lets say you wake up at 8 am and the tide is high. If you wake up at 8 tomorrow the tide will have another 45 minutes before it is at its highest point.

    The tides cycle 4 times in a 24 hour period. High then low then high then low, each 6 hrs and 12 minutes apart.

    So if its high at 8:00 am it would be low at 2:12 pm then high at 8:24 pm and low at 2:36 am and high at 8:48 am
     
  13. MongoTheGeek macrumors 68040

    MongoTheGeek

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    Sep 13, 2003
    Location:
    Its not so much where you are as when you are.
    #13
    Where I work we resell tide data, (among other things) Every year we buy a CD from NOAA with a years worth of data and then digest it for republication.

    The timing is also location specific. It depends on the shape of the inlet, the distance inland. New York and Philadelphia are geographically close but their tides are 180 degrees out of phase! There is an hour difference between Manhattan and Brooklyn.
     

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