Put the blame on gradient wind
During the last few days we have been constantly hearing about "gradient winds" and how they influence the development of the seabreeze. What are gradient winds? Why do they kill the developing seabreeze. Here is the answer from Marta Weores, former Hungarian Olympic sailor and meteorology strategist for Shosholoza.
The gradient wind is the horizontal wind in the upper atmosphere that moves parallel to curved isobars. It results from a balance between pressure gradient force (i.e. difference between pressures), influenced by the Coriolis force and the centripetal force.
The gradient wind can either help or hinder seabreeze development depending on its strength and direction. We are having light gradient winds these days which are OK for the seabreeze. Depending on the orientation of the shoreline near any race course area, the direction of the gradient wind will influence the seabreeze development.
In the Valencia race area, the NE gradient wind is the worst for seabreeze development, and unfortunately that is what we have. This is one of the reasons why seabreeze is struggling to develop.