06 December 2013

"Cross sea" and "cross swell"

"In surface navigation, a cross sea is a sea state with two wave systems traveling at oblique angles. This may occur when water waves from one weather system continue despite a shift in wind. Waves generated by the new wind run at an angle to the old, creating a shifting, dangerous pattern. Until the older waves have dissipated, they create a sea hazard among the most perilous."
A cross swell is generated when the wave systems are longer period swell, rather than short period wind generated waves
Amazing.  I didn't even know this could happen.  You learn something every day.

Text and image from Wikipedia, via The Soul is Bone.


  1. That looks absolutely terrifying. I can't imagine trying to navigate in that.

  2. I've seen that sort of thing when out surfing: it's common to have two different wave sources when weather is changing, or if there are two storms following each other up the coast. I've definitely never seen it as clear and as right-angled as in the above image, that's pretty cool.

  3. Wow! I don't think I've ever seen anything like cross seas or cross swells. Sure wouldn't want to have to navigate it. BTW, that photo is just amazing.

  4. I agree with the above commenters. That picture is very striking!

  5. I never would have imagined that possible. A beautiful photo as long as you don't have to be in the water.

  6. Clearly this is the result of chemtrails. [/sarcasm]

  7. ? But what is the big dark object at the left view of the beach ? A submarine ? A Loch Ness type creature ? An internet delivery tube ? A SEWER ?

    1. None of the above. It is a man made structure intended to slow down the erosion of the beach. There are several of them around the western tip of the island. Search for "Phare des Baleines".


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