Discussion:
wave height off pensacola hits 30 ft
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M***@kymhorsell.com
2018-10-10 10:09:00 UTC
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<https://www.ndbc.noaa.gov/show_plot.php?station=42039&meas=sght&uom=E&time_diff=0&time_label=GMT>


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george152
2018-10-10 19:26:01 UTC
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On 10/10/2018 11:09 PM, ***@kymhorsell.com wrote:

Rubbish
If that worries you don't go to sea.

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Bret Cahill
2018-10-10 19:49:31 UTC
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Post by george152
If that worries you don't go to sea.
Vessel owners don't give the masters much choice.
Bret Cahill
2018-10-10 19:48:26 UTC
Permalink
Post by M***@kymhorsell.com
<https://www.ndbc.noaa.gov/show_plot.php?station=42039&meas=sght&uom=E&time_diff=0&time_label=GMT>
If you want a hockey stick plot kinetic energy of the waves vs time and then take a gander at the 2nd - 6th order derivatives.

Ignoring length both mass and velocity of the wave increase with the square of height.

KE = 1/2 mv^2 ~ height^6

A 10m wave has 64 times the energy of a 5 m wave.
R Kym Horsell
2018-10-10 21:13:18 UTC
Permalink
Post by Bret Cahill
Post by M***@kymhorsell.com
<https://www.ndbc.noaa.gov/show_plot.php?station=42039&meas=sght&uom=E&time_diff=0&time_label=GMT>
If you want a hockey stick plot kinetic energy of the waves vs time and then take a gander at the 2nd - 6th order derivatives.
Ignoring length both mass and velocity of the wave increase with the square of height.
KE = 1/2 mv^2 ~ height^6
A 10m wave has 64 times the energy of a 5 m wave.
I was allays impressed that a 100 km wave can runup upto 39m above sea level
just because of the v**2 thing.

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