In addition, there could be some spotty activity over the viewing area later this evening, but the chance is a bit lower at 20% and the western half of the viewing area will have the best chance for any shower and thunderstorm development.
In addition to the mention of a 40% chance for showers and storms from earlier, I just checked out the HRRR model data, which was the only model to really be on the money yesterday despite typically trending wetter than what usually happens. This data is the most bold in terms of producing widespread scattered showers and storms across the region prior to sunset today. While the upper level energy is displaced further to the west today which would make for less favorable rain chances than what we saw yesterday afternoon, given the very warm conditions and decent moisture levels aloft, an outflow boundary moving eastward into our viewing area from the storms firing off to our west could create a new complex of storms that, again, would be scattered across the viewing area later this afternoon and evening.
-Matt Madigan, KSAN Chief Meteorologist