After a gorgeous weekend, expect nice weather to start the week off; however, an upper-level low off the California coast will tap into tropical moisture from our south for an increasing chance of showers and thunderstorms later this week. Expect mostly sunny skies today with highs in the mid-70s, light northeast winds 5-10 mph at times. Mid and upper-level moisture will begin to increase tomorrow in the form of high clouds, but we'll keep the forecast dry with highs again in the mid-70s, southerly winds 5-15 mph during the afternoon. This low off the West Coast will tap into moisture from Tropical Storm Mario down near Cabo and draw it northward into our region beginning Wednesday. This should bring a chance for more traditional afternoon showers and thunderstorms over the mountains and deserts as highs cool to the lower 70s. As this low approaches our area on Thursday and Friday, deeper moisture and instability will arrive, bringing a better chance for widespread showers and storms across all of Southern California. Cooler through the end of the week as highs drop into the 60s with lows generally in the 40s. Moisture will linger into the weekend for a chance of showers and thunderstorms through at least Saturday, decreasing on Sunday before we return to more seasonal late summer and early fall-like weather.