By Reginald Stanley. Posted September 30, 2023, 10:49 AM.

Low pressure moving southeastward over California this weekend, in addition to a deep marine layer, is producing scattered drizzle across parts of the region Saturday morning and is forecast to continue through Sunday.

As of 1030 Saturday morning, only Fallbrook has recorded measurable precipitation in the WeatherCurrents network, with a total of 0.04 inches. As low pressure closes in on the region over the course of the day, light showers could become more widespread in the afternoon and overnight west of the mountains, with higher totals in the mountains themselves. Projected precipitation totals for the inland valleys are up to 0.10 inches, with locally higher amounts of up to 0.20 inches possible in some locations through the end of Sunday. Slightly wetter totals are predicted for much of San Diego County, with projections of up to 0.30 inches. The San Bernardino Mountains and Cajon Pass could see steadier rainfall with higher amounts, while the deserts are expected to see very limited precipitation, if any at all. A slight chance of isolated thunderstorms exists for portions of inland Riverside and San Bernardino counties Saturday afternoon due to deep-layer moisture and instability. Snow levels are hovering around 8,000 feet above sea level Saturday morning, but will likely lower to near 6,500 feet Saturday night/Sunday morning.

The trough will exit east of the region on Monday, being replaced by high pressure and offshore flow later in the week. Warmer, drier conditions in the 80s and 90s are possible inland around Thursday-Friday.