Changes will arrive from Thursday through Saturday as a ridge of high pressure calms our winds and clears out any cloud cover. The ridge will also boost afternoon high temperatures quite a bit. Daytime highs will be peaking 5 to 15 degrees above seasonal, especially on Friday and Saturday, west of the mountains. The peak of the heat will be Saturday and Sunday for the mountains and the desert as high pressure treks east. MORE: https://www.cbs8.com/article/weather/forecast/san-diego-weather-update/509-addbcd08-0811-489a-b511-7cd202ccde99