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Old 14-11-2014, 19:56   #1
F51
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Wind/wave forecasts

It seems to me that Weather Radio's winds and waves tend to be a little light. Time after time it seems to me the wind is stronger and waves higher than their forecast. What say you?
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Old 15-11-2014, 02:20   #2
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Re: Wind/wave forecasts

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Originally Posted by F51 View Post
It seems to me that Weather Radio's winds and waves tend to be a little light. Time after time it seems to me the wind is stronger and waves higher than their forecast. What say you?
I find that if I add 10-15% to forecast (even Predict Wind) then it is correct. Don't forget - all forecasts are averages - so if they say 15 knots of wind - then you can expect to see anything from say 12 to 18 knots with gusts even higher.

Same for the waves
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Old 15-11-2014, 03:27   #3
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Re: Wind/wave forecasts

We have always added at least 5k
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Old 15-11-2014, 06:45   #4
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Re: Wind/wave forecasts

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We have always added at least 5k
Unless the forecast is 5-10 knots. Then you usually need to subtract 5
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Old 15-11-2014, 08:28   #5
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Re: Wind/wave forecasts

The wind forecast is for 10m height above the water. You are measuring higher up, so more wind is expected. There is a gradient in the wind speed between near the water and higher up.
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Old 15-11-2014, 16:30   #6
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Re: Wind/wave forecasts

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The wind forecast is for 10m height above the water. You are measuring higher up, so more wind is expected. There is a gradient in the wind speed between near the water and higher up.
Attachment 91684
Here's another view that makes it even clearer:
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