If you ever notice a checkerboard or grid-like pattern on the ocean’s surface-known as square waves or a cross sea-it’s more than just a striking visual phenomenon. Square waves form when two different wave systems, generated by winds from separate weather events, intersect at nearly right angles. This creates a crisscross pattern that can be seen from above or from high vantage points along the shore.
Whilst square waves may appear mesmerizing, they are associated with hazardous conditions. The intersecting wave systems create unpredictable and powerful currents, including rip currents, which can pose serious dangers to swimmers, surfers, and small boats. These currents may pull individuals in multiple directions, making escape difficult and increasing the risk of being swept out to sea. If you spot square waves forming, it’s best to stay out of the water. Even experienced swimmers and boaters can find it challenging to navigate these unpredictable currents, and maritime accidents have been linked to cross sea conditions. Enjoy the view from a safe distance, but avoid entering the water until conditions return to normal
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To Conclude, if you see this get out of the water! or if your in a small boat get it moored up.
Hi I am Marcus, MM0ZIF, a licenced Radio Amateur, Doctor of Musicology, amateur weather enthusiast. I over the years have been a Amateur Radio Tutor, Examiner, and a Regional Manager for the Radio Society of Great Britain.
This site is dedicated more towards Amateur Radio and Weather, with an angle on Technology too. I also maintain https://havenswell.com/ which is my other blog which is more aimed at cooking, hobbies and life in general as well as businness and networking.
