I have a chart app on my phone that gives the tide for all around the country. Obviously I have it set to the tide in Portsmouth. Up until yesterday, the charts have shown an even frequency wave, sometimes sinusoidal.
Yesterday, I noticed that the flood (incoming) tide has a step – the rate changes and then resumes its normal rate of increase. You can see it in the picture below.
This morning, on the #Brerakfastclub I asked G6RTE Jo what could be causing it. Jo is a former ships captain and knows the waters of the Solent very well. He explained that there is a collision between the dual flood and ebb tides of the solent.
What I hadn’t noticed is the little plateau on the ebb tide. This is also part of the tidal system that I hadn’t known. Jo told me that Chimet (Chichester Meteorology) https://www.chimet.co.uk/(S(jrduwlrkmad4gs55qooano45))/Default.aspx showed the updated waveform as well, and had only just done so. Chimet is a very interesting resource. Well worth having a look at. What an interesting morning that turned out to be.
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