Here it must be differentiated first and as a concept, what is the east wind and what is the breeze associated with the marinade, which in the present case, due to the situation of the sea to the east, is where it comes from.
In the first case, the east wind is associated with a depression in the Mediterranean that implies an entry of humid winds and cloudy skies, low ceilings and rainy days, giving few opportunities to the area to fly in favorable conditions. They are not usually very violent wind inputs except for rare occasions, they usually persist more than one or two days.
In the second case, winds associated with the sea breeze and, therefore, with an east or southeast component, is a phenomenon that due to recurrence and the time of greater frequency in which it occurs we will pay special attention, since it gives us a series of risks associates that we must take into account especially in this area.
The marinade is a breeze from the sea and the nearby coastal areas (Gulf of Roses, Costa Brava). It produces an entry, above all, of the overheated wind from the Empordà plain, giving a rise, in some cases even violent, in wind intensity and, gradually, a constant intensity is established, with high humidity and low temperature, as it sweeps away all the wind that is found, making room for the wet and fresh wind coming from the sea.
This gives rise to an entrance from the lower elevations to the higher ones, unlike the west.
This effect is important when planning landings in compromised places, since it is highly probable that there will be no wind at the flight level and that there will be lift at the level of the landings in the valley bottoms.