Lingering monsoon moisture could trigger a few afternoon thundershowers on Wednesday as highs cool to the mid 70s, with south-southwest winds 5-10 mph during the afternoon. Moisture from Tropical Storm Juliette west of Baja will be drawn northward on Thursday for a chance of showers across all of Southern California. Convection should remain limited, and precipitation amounts generally on the light side as highs cool to the lower 70s. Residual monsoon moisture could bring an isolated afternoon shower or storm on Friday, though conditions will dry out a bit through the weekend as the monsoon flow shifts east. Warmer over the holiday weekend as highs climb back up to around 80 degrees by Labor Day, with overnight lows in the 40s and 50s. We could experience another surge in monsoon moisture early next week for a returning chance of afternoon thundershowers. If you have any outdoor activities planned through the holiday weekend, keep a watchful eye on the sky and head indoors if thunderstorms develop near your area.