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OK, jaxie, please, explain. You've implied several times that I'm
wrong, but you haven't even hinted at why. All you've done is provide a
meaningless link. Do you have anything meaningful to contribute? No?
We didn't think so.
JAXAshby wrote:
jeffies, that is the problem when you google trying to prove you are not dumber
than a shoe box. you read the terms but miss the exact meaning of the words.
English, at least English as used by people who graduated high school, is a
foreign language to you.
jeffies, ever watch a foreign immigrant trying to catch a taxi cab across town?
you are even more off base.
From: Jeff Morris
Date: 12/19/2004 7:04 PM Eastern Standard Time
Message-id:
Do you have any idea what that means, jaxie? No? We didn't think so.
It has very little to do with the issue at hand. You continue to
embarrass yourself.
Here's the link that defines the terms used in the buoy data.
http://www.ndbc.noaa.gov/measdes.shtml
Where it explains "Significant wave height (meters) is calculated as the
average of the highest one-third of all of the wave heights during the
20-minute sampling period."
It turns out that individual wave data is not sent from the buoys, it is
transformed by FFT into frequency data before being transmitted. (Sorry
about the FFT reference, jaxie. Don't let it bother you, you wouldn't
understand it.)
JAXAshby wrote:
jeffies, once again you show one and all you are not to be left alone
without
adult supervision. from the noaa site comes this quote:
"The term parametric refers to the prediction of parameters that describes
a
single representative wave. "
ask your wife, jeffies, just what the words "single" and "representative"
mean.
here is the complete site:
http://nauticalcharts.noaa.gov/csdl/op/cbwavesd.htm
kriste, jeffies, it took less than 30 seconds on google to find a specific
quote that once again you are wrong. what a fumb duck.
From: Jeff Morris
Date: 12/19/2004 5:43 PM Eastern Standard Time
Message-id:
JGS wrote:
On Sun, 19 Dec 2004 18:29:14 GMT, WaIIy wrote:
On Sun, 19 Dec 2004 17:56:54 GMT, "Roger Long"
wrote:
I've been kind of interested in some of the posts about Lake Erie
conditions
to see references to 12 foot waves. I know the waves are shorter and
steeper
there due to the lighter water and shallow depths. Twelve footers would
considered pretty big however, even on the ocean.
I've been pretty involved in past years with marine safety and accident
investigation projects and this gave me a chance to look into wave
height
reports. There is a pretty consistent tendency for even experienced
seaman
to over estimate wave heights by about 100 percent.
I lived on Lake Erie (near Cleveland) for 6 years and near the lake for
50 years and have never see or reliably heard of 12 footers.
The highest I have been in are 7- 8 footers and wouldn't like to do that
again.
Lake Erie is notorious due to the closeness of the waves. Everything
is a chop 1ft-2ft-6ft chop.
Of course, when it is rolling or fairly flat, it's wonderful (if quite
brown).
See:
http://www.ndbc.noaa.gov/station_page.php?station=45005
Look at the data significant wave height:
http://www.ndbc.noaa.gov/images/climplot/45005_wh.jpg
Looks like it came close to a 12 footer at least on one occasion. Perhaps
in
the Central Basin it may have reached 12'.
But you're right, a 12 footer seems quite rare if it ever did quite make
it.
If you look at the text data you'll see that that the "significant wave
height" only reached 4 meters (13 feet) once in a 20 year period.
However, it did get over 3 meters several times a year, and over 2
meters numerous times. Of course, the worst weather is in the Spring
and Fall (and the the buoy is pulled in the Winter) so the Summer sailor
will not likely see these conditions.
"Significant wave height" is the average of the higher third of all
waves, measured over the course of an hour. If that is 3 meters, then
the average of the highest tenth of all waves would be about 4 meters.
Thus, many individual 12 foot waves have happened, though usually no one
was there to witness them.
Anyone who goes out when the wave height is 6 feet (as it was the last
time I was on Lake Ontario) will likely see some 8 footers and maybe, if
they're out all day, a few 10 footers.
BTW, in a hurricane significant wave height will get much larger - 10
meters would easily be possible.
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