A trough off the West Coast will maintain a stronger onshore flow for cooler temperatures and gusty west winds at times through the end of this week with daytime highs in the lower 70s as overnight lows generally cool to the 40s, with west winds 10-20 mph during the afternoons. As we head into the big holiday weekend, low pressure off the California Coast may draw tropical moisture northward into our area, with increasing clouds on Saturday, where an afternoon shower or thunderstorm is possible. Scattered mainly afternoon showers and thunderstorms are more likely Sunday into Monday, primarily over the mountains and deserts, but showers are possible just about anywhere across SoCal. At this time, it appears the deepest moisture will move inland to our south and east, with heavier rain possible near the Colorado River Valley and into Arizona. Temperatures will remain 5-10 degrees below average through the weekend, warming slightly by the middle of next week under weak troughing. Another tropical system in the East Pac could also send additional moisture our way next week, but the exact details are currently unknown.

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