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NickB
Joined: 30 Jun 2009 Posts: 510 Location: Alameda, CA
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Posted: Fri Jan 11, 2013 9:18 pm Post subject: |
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makes sense. thanks.
before this thread, I'd have called Gerritt's jump on that beautiful picture a 12ft jump because he appears to peak at about 12ft above the water (from his eyes, looking down). |
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MrFish
Joined: 04 Sep 2009 Posts: 248
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Posted: Sat Jan 12, 2013 1:14 pm Post subject: |
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A couple of things:
1. How does this thing work on an ipod touch, which has no GPS?
Misprint?
2. I'd call Garret's jump 4-5 ft, prolly 5.
3. I had a Garmin 201 for years, it was very accurate for speed.
I'd guess that all of these devices would be less reliable for height. |
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keycocker
Joined: 10 Jul 2005 Posts: 3598
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Posted: Wed Jan 23, 2013 12:32 pm Post subject: |
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Glen the Weatherman in Maui often mentions the wave height numbers.
He says that Hawaiians use the number at the buoy which measures the mean difference from sea level. This would be about half the swell face when you are outside and even less when the shoreline effects jack up the faces.
It would also be an average of the big and small swell coming through, not the ones we are looking to ride. |
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dllee
Joined: 03 Jul 2009 Posts: 5328 Location: East Bay
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Posted: Wed Jan 23, 2013 6:12 pm Post subject: |
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Yes, measuring wave heights at the buoys has tons of relevance to wave heights on shore where you windsurf. |
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keycocker
Joined: 10 Jul 2005 Posts: 3598
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Posted: Wed Jan 23, 2013 10:22 pm Post subject: |
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That is the swell height number you get from NOAA which has a big presence here. Locals know that when talking waves and apply their own experience as to shoreline jacking effects.
If you say it is 4 ft South swell they know that means overhead at Grandmas and 10 ft faces at thousand peaks or maybe 9 but with the NOAA number you got the raw data on which the speaker is basing the call. |
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LeeD
Joined: 12 Jun 2008 Posts: 1175
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Posted: Wed Jan 23, 2013 10:38 pm Post subject: |
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Did you forget period and direction? Location?
This last "big" swell was mostly 2' at 25 seconds, resulting in waves as large as 20' at Mavericks.
A swell rated 2' at 8 seconds would not show a ripple there, or at inside Ross's Cove. |
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keycocker
Joined: 10 Jul 2005 Posts: 3598
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Posted: Fri Jan 25, 2013 12:28 am Post subject: |
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Ever chat with a Hawaiian surfer?
They name the direction as in North swell 4ft but then the conversation switches to jacked up trucks and nookie.j
I am not promoting the methodology, only explaining why their numbers seem inconsistent with the waves faces they are discussing. |
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keycocker
Joined: 10 Jul 2005 Posts: 3598
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Posted: Fri Jan 25, 2013 12:37 am Post subject: |
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On a related topic.
When you look in the Maui news at the wind it says 5 to 15 that means 20 to 30 at Kanaha.
No problem. We know what it means, but the tourist seem a little confused. |
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dllee
Joined: 03 Jul 2009 Posts: 5328 Location: East Bay
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Posted: Fri Jan 25, 2013 8:00 pm Post subject: |
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"ever chat with a Hawaiin surfer" ....
I've been to Oahu to surf over 12 trips, two of which we stayed over 3 months in the winter.
LanceHookuono lived at my house for 2 years, when drugs caught up to him on SouthShore and he needed refuge.
Just like on the mainland, some exagerate, some tell it like it is. |
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keycocker
Joined: 10 Jul 2005 Posts: 3598
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Posted: Mon Jan 28, 2013 3:46 am Post subject: |
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Didn't mean to rile you.
I was making a joke with LeeD about debating periodicity with guys in baggies.
My apology, the explanation I gave was not my own.
I attributed it correctly to Glen the weatherman on public TV Maui. |
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