SOUTHERN CALIFORNIA — Another fast-moving Pacific storm system is expected to sweep into Southern California beginning Monday afternoon, bringing moderate to heavy rain, mountain snow, and a colder air mass into the region through late Monday night and early Tuesday. Forecasters say the system will arrive quickly, targeting northern portions of Southern California as early as 2–3 PM before pushing south toward Los Angeles and eventually San Diego between 10–11 PM.
Rain Arrives This Afternoon With Heavy Showers in Spots
Meteorologists report that the storm is already visible on the horizon, with clouds breaking earlier today ahead of the next surge of moisture. This incoming system will deliver:
- Moderate to heavy rain bands moving from Santa Barbara into Ventura
- A push into Los Angeles County through the late afternoon
- Broader rain coverage into Orange County and San Diego by late evening
- Widespread off-and-on showers persisting through Tuesday morning
While thunderstorms are unlikely, a few isolated pop-up cells may form behind the main system due to lingering moisture.
Thunderstorm and Flood Risk Remain Low
Forecasters state the thunderstorm risk is extremely low, with the strongest storm ingredients absent across most of Southern California. Instead, this system functions as a rain-producer, delivering steady precipitation without the intense punch of the previous storm.
While widespread flooding is not expected, localized ponding, slick roadways, and reduced visibility may still impact evening and overnight travel.
Mountain Snowfall Expected at 6,000 Feet and Above
One of the most significant impacts from this system will be mountain snow, with colder air accompanying this storm compared to the last one. Snow is expected to accumulate:
- Near 6,000 feet, where snowfall will stick
- In higher elevations, where heavier snow totals are likely
- Across ranges that saw only light snowfall during the last system
ZoneWatch snow model guidance continues to show more robust snowfall potential, particularly in the San Bernardino and San Gabriel mountains. Travelers heading into mountain communities should plan for winter driving conditions.
Southern California Sees a Quick Break Before More Storms This Week
With sunshine and breaks in the cloud cover this morning, many residents enjoyed a calm start before this new system approaches. After the storm passes through Tuesday, another break is expected before additional storm energy arrives later in the week, continuing an active pattern for Southern California.
Forecasters Kevin and Sina will continue issuing updates as new model data becomes available.
Radar and Model Tools Available on ZoneWatch
Those seeking real-time storm tracking can access the Radar and Model features on the ZoneWatch platform, which display rainfall intensity, storm direction, and snowfall projections.
Stay Weather Aware as More Systems Approach
Residents throughout Southern California — especially those in northern counties, mountain regions, and travel corridors — should stay alert to rapidly changing conditions as the fast-moving system pushes through…