A trough off the West Coast will bring cooler temperatures over the weekend and possible showers Saturday night into Sunday as low pressure slings some tropical moisture in our direction. Looking at clear skies this evening with west winds 5-15 mph as lows cool to the 40s and lower 50s. We'll start the big holiday weekend off on a good note under partly cloudy skies on Saturday with highs in the lower 70s. Westerly winds increasing 10-15 mph during the afternoon with gusts to 20 mph. Tropical moisture from Hurricane Marie will be drawn northward into our area Saturday night, with increasing clouds and scattered showers developing. Unfortunately, Sunday could be a rather soggy day with scattered showers as highs cool to the 60s. Some instability could spark an isolated thunderstorm, but overcast skies may prevent a lot of instability. As a moist southwest flow continues into Labor Day, we could see a few lingering showers, gradually clearing as this slug of moisture lifts northeast out of the area. Total rainfall amounts of around a tenth to quarter inch are possible across much of SoCal, with locally a half inch or more possible in the mountains or around any thunderstorm that develop. Additional moisture may keep a chance of afternoon showers and thunderstorms in the forecast through the middle of next week as temperatures remain slightly below average.

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