Clear skies will prevail over the deserts today, while lower clouds slowly break west of the mountains. A cooling trend is underway as the marine layer deepens and a storm system approaches from the northwest. Some light rain showers could break out later tonight into Sunday morning, but the best chance for widespread rain and mountain snow will come on Monday and Tuesday. Heavy snow will fall over the mountains. Periods of rain and snow showers will continue through midweek before this slow-moving storm exits the region. Temperatures will be well below average until next weekend, when high pressure builds from the west.

	Today: 64°F  49°F  Mostly cloudy, becoming partly sunny. 30 percent chance of rain in the morning, then a 25 percent chance of rain in the afternoon 30% chance of precipitation Predicted Air Quality: good, AQI: 43 (courtesy of the SCAQMD). Pollen level is rated "medium-high".
	Sunday night / Monday morning: 59°F  Mostly cloudy and cool. 30 percent chance of rain in the evening, then a 75 percent chance of rain after midnight 75% chance of precipitation
	Monday: 59°F  Mostly cloudy and breezy. 90 percent chance of rain in the morning, heavy at times, then an 80 percent chance of rain in the afternoon, heavy at times 90% chance of precipitation
	Monday night / Tuesday morning: 45°F  Mostly cloudy. Cool and breezy. 80 percent chance of rain in the evening, heavy at times, then a 70 percent chance of rain after midnight, heavy at times. Slight chance of thunderstorms 80% chance of precipitation
	Tuesday: 63°F  Partly cloudy. 35 percent chance of showers and a slight chance of thunderstorms in the morning, then a 40 percent chance of showers and a slight chance of thunderstorms in the afternoon 40% chance of precipitation
	Tuesday night / Wednesday morning: 43°F  Partly cloudy and cool. 35 percent chance of showers in the evening then a 40 percent chance of showers after midnight 40% chance of precipitation
	Wednesday: 63°F  Partly sunny. 45 percent chance of showers in the morning, then a 60 percent chance of showers in the afternoon 60% chance of precipitation
	Wednesday night / Thursday morning: 46°F  Partly cloudy and cool. Chance of showers and a slight chance of thunderstorms 35% chance of precipitation
	Thursday: 64°F  Partly sunny. Chance of showers 35% chance of precipitation
	Thursday night / Friday morning: 48°F  Partly cloudy and cool 15% chance of precipitation
	Friday: 71°F  Partly sunny, becoming mostly sunny 0% chance of precipitation
	Friday night / Saturday morning: N/A  % chance of precipitation
	Saturday: N/A  % chance of precipitation