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Per(s)??????

 
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iamsmitty



Joined: 10 Sep 2001
Posts: 3

PostPosted: Wed Jul 09, 2014 8:07 am    Post subject: Per(s)?????? Reply with quote

What does Per(s) mean on the wind forecast table?
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outcast



Joined: 04 May 2004
Posts: 2382

PostPosted: Wed Jul 09, 2014 8:50 am    Post subject: Reply with quote

I think you are talking "Period"(s)
Period = INTERVAL BETWEEN and under the WAVE

This would be under the Wave height section.

Short period (3 seconds) is wind slop.

Long period stuff is good for surfing, windSURFing.....Like 22 seconds!

3 foot at 3 second periods is a small washing machine
3 foot at 22 seconds is some mackin big fun....alot of water under the dome

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whitevan01



Joined: 29 Jun 2007
Posts: 469

PostPosted: Wed Jul 09, 2014 12:24 pm    Post subject: Reply with quote

just to amplify:

period is time per cycle. So, it's the amount of time between wave crests. If the period is 5 seconds, for example, and you were anchored in a row boat (standing still), and you started a stop watch when a wave crest lifted you up, it would be 5 seconds before the next wave crest lifted your boat. (example taken from a past NYS physics regents exam) lol


just so you know, frequency is cycles per time and is the inverse of period. so a period of 5 seconds is the same as saying the frequency is .2 Hz or .2 1/s.
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WaterKook



Joined: 10 Apr 2000
Posts: 1452
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PostPosted: Wed Jul 09, 2014 1:38 pm    Post subject: Reply with quote

If you don't surf don't start!!! Laughing
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iamsmitty



Joined: 10 Sep 2001
Posts: 3

PostPosted: Thu Jul 10, 2014 8:11 am    Post subject: Reply with quote

That explains it. Thanks.
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justall



Joined: 30 Jul 2007
Posts: 192

PostPosted: Fri Jul 11, 2014 9:16 pm    Post subject: Reply with quote

WaterKook wrote:
If you don't surf don't start!!! Laughing


That had me laughing. I guess it's that time of year when the lots are full and the lineup is chaotic.
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