Southern California is bracing for the impact of two consecutive storms, with the first one already making its presence felt. The region is expected to experience significant rainfall over the next few days due to an atmospheric river bringing heavy moisture. Here’s a comprehensive overview of the weather conditions and their potential effects.

Timing and Intensity of Rainfall

The initial signs of precipitation emerged late Wednesday night in the greater Los Angeles area, intensifying into heavy rain by 6 a.m. Thursday. The storm is predicted to reach Orange County and the Inland Empire by 8 a.m., with rain falling at rates of up to a half-inch per hour. Isolated areas might experience a more intense rate of three-quarters-of-an-inch per hour. By 2 p.m. Thursday, the rain is expected to transition into scattered showers.

According to the National Weather Service, this system is characterized by its quick movement but possesses a strong upslope component, particularly enhancing rain rates in the foothills and mountains. Additionally, models suggest some instability, raising the possibility of isolated thunderstorms, particularly over coastal waters.

Friday and Saturday are expected to be mostly dry, with some lingering showers but no significant flooding issues anticipated.

Affected Areas in Southern California

Los Angeles County:

Late Wednesday night, downtown and East L.A. experienced 1 to 2 inches of rain, intensifying on Thursday morning. A high surf advisory is in place until Saturday, with west-facing beaches expecting waves reaching 8 to 12 feet.

Orange County:

Widespread rain is forecasted, accompanied by a flood watch and high wind watch on Thursday. High surf advisory for beaches with waves ranging from 4 to 8 feet.

Valleys and Inland Empire:

Heavy rain is expected, with rainfall totals ranging from 2 to 4 inches.

Mountain Communities:

Snow levels will drop to 6,000 feet on Thursday, bringing several inches of snow to higher elevations. A winter storm watch is in effect, with 12 to 24 inches of snow possible above 7,000 feet.

What to Expect Next

Southern California can anticipate reduced rainfall on Saturday, but the forecast indicates rain for the upcoming weekend. Moreover, a second storm is looming, set to arrive on Sunday and persist until Tuesday, potentially even Wednesday. This extended storm cycle could bring widespread rain totals of 2 to 4 inches in lower elevations and possibly double that amount in south-facing mountains. Flooding and mudslides are plausible outcomes.

In these challenging weather conditions, residents are advised to stay informed about updates and take necessary precautions. Stay tuned for the latest weather forecasts and warnings as the situation unfolds.