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Tides?

Old 01-12-2017, 03:49 PM
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Default Tides?

I understand the tides on the ocean and how the moon effects and causes them. But I'm wondering are there tides on the Great Lakes? Even if miniscule are there any due to the gravitational pull of the moon?
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Old 01-12-2017, 04:12 PM
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Yes..
https://tidesandcurrents.noaa.gov/ofs/glofs.html (look on the right)
However, there is some disagreement on the subject. According to the Canadian Hydrologic/Hydrographic Service, the Great Lakes experience tides from 1 to 4 cm, the strongest being on Lakes Superior and Erie. These tides are often masked out by meteorologically induced phenomena, such as a seiche (pronounced "sayshe"). When wind pushes down on one part of a lake, the water surface rises in another part, producing waves (most noticeable on Lake Erie because the lake is so shallow).
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Old 01-12-2017, 06:12 PM
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There are tides on every body of water; the shorter the width the smaller the tide.
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Old 01-13-2017, 04:40 AM
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Originally Posted by mikefloyd View Post
There are tides on every body of water; the shorter the width the smaller the tide.
This.

Tides are also greatly affected by geographic location and the physical characteristics of the coastline and ocean bottom counters.
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Old 01-13-2017, 10:24 AM
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Tides caused by the combined forces of the sun and moon, is less than five centimeters in height on the Great Lakes.
Consequently, the Great Lakes are considered to be non-tidal.




Do the Great Lakes have tides? - NOAA's National Ocean Service
oceanservice.noaa.gov › Ocean Facts

https://www.google.com/url?sa=t&rct=...5F2ZAnD2iP8FRA
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Old 01-13-2017, 10:40 AM
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Speaking of tides I never could figure them out but tides4fishing.com makes it idiot proof. Best time of day to fish, poor/good/great fishing days, etc. It really works!
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Old 01-13-2017, 10:53 AM
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Originally Posted by martyf View Post
I understand the tides on the ocean and how the moon effects and causes them. But I'm wondering are there tides on the Great Lakes? Even if miniscule are there any due to the gravitational pull of the moon?
Yes. There is "tidal force" on the entire earth, crust and all. It just isn't meaningful.
As someone has said above, the true tide on the Great Lakes is an inch here or there.

In general, you pretty much have to have unimpeded water body continuity to the equatorial bulge to get a meaningful "true tide" (in terms of water depth concerns).

Winds and topography can create meaningful depth changes that mimic tidal periodicity, but they aren't "true tides".
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