Christmas storm still on track to hit Southern California. Here is when the heaviest rain arrives

Southern California is preparing for a powerful winter storm over the Christmas holiday, with forecasters warning of heavy rainfall, gusty winds, and potential flooding across the region.

According to the National Weather Service, the storm will bring an extended period of significant rainfall from Tuesday through Saturday, with totals expected to reach 4 to 8 inches across coastal and valley areas and 8 to 12 inches or more in the foothills and mountains by Saturday evening. Officials are urging residents to take necessary precautions, as flooding and debris flows could pose serious risks throughout the week.

The first, and most impactful, surge of rain is expected Tuesday night into Wednesday, when a moderate to strong atmospheric river will target the area. During this period, rainfall totals could reach 2 to 5 inches in coastal and valley regions and 5 to 10 inches in foothills and mountain areas, with hourly rates of 0.75 to 1.25 inches possible. The extended rainfall and intensity raise concerns about widespread urban flooding, mud and debris flows, and hazardous driving conditions, particularly during one of the busiest travel periods of the year.

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A flood watch has been issued for all four counties from Tuesday afternoon through Wednesday evening, and the National Weather Service recommends that residents begin taking protective actions now.

In addition to heavy rain, strong southerly winds are expected Tuesday and Wednesday, particularly in the mountains and foothills, with the potential to knock down trees and cause power outages. Officials are advising residents to avoid swollen creeks and rivers, refrain from unnecessary ocean activity, and take precautions such as parking vehicles away from tall trees during periods of strong wind.

Forecasters emphasized that the timing and intensity of the storm could still change and encouraged residents to monitor updates from the National Weather Service and KTLA’s meteorologists.

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