Los Angeles, CA, December 21, 2025
As Christmas approaches, Los Angeles is bracing for a powerful storm dubbed the ‘Pineapple Express.’ Expected to bring heavy rain and strong winds, the storm could result in flooding and mudslides. Local residents are encouraged to prepare for the weather’s impact, especially during the busy holiday travel period. The National Weather Service has alerted residents to the potential for significant rainfall rates and travel disruptions. All Southern California regions, including Ventura and San Diego, are on alert for this powerful atmospheric river.
Los Angeles Prepares for Significant Rainfall This Christmas Week
A Powerful Storm Set to Impact Southern California
Los Angeles, CA – As Christmas approaches, Southern California is gearing up for an intense weather event driven by a powerful atmospheric river, referred to as the “Pineapple Express.” Kicking off on Tuesday, December 23, 2025, and continuing through Christmas Day, this storm is predicted to deliver heavy rainfall and robust winds, marking one of the most substantial precipitation events in decades. Downtown Los Angeles is facing an 80% likelihood of receiving 2 or more inches of rain, reminiscent of the significant rainfall last recorded over the holiday season in 1971.
Local entrepreneurs have shown remarkable resilience and adaptability in preparing their businesses for potential disruptions caused by this weather system. Though storms can pose challenges, they also offer the community a chance to reinvigorate discussions around resilience, innovation, and the importance of supportive regulations that empower businesses to respond quickly to environmental challenges.
Storm Details and Timing
The National Weather Service has laid out a clear timeline for the storm’s arrival. Beginning Tuesday night, it will move through Los Angeles, Ventura, Santa Barbara, and San Luis Obispo counties, with rain continuing into Wednesday and Thursday. Orange County, the Inland Empire, and San Diego County may experience lighter showers on Tuesday, but it is Wednesday when the heaviest rainfall is expected. Residents should prepare for significant rainfall rates, especially in mountainous regions, potentially reaching from half an inch to one inch per hour.
Potential Impacts
Residents are urged to brace for several significant impacts from the storm:
- Flooding: There is a high chance of flooded freeways, rivers, and some homes and businesses due to heavy rainfall.
- Mudslides: Regions affected by wildfires face heightened risks of mudslides and debris flows when combined with heavy rain.
- Strong Winds: Southward gusts could exceed 53 mph, raising the possibility of fallen trees and downed power lines.
Travel Considerations
With holiday travel in full swing, the storm’s impact on travel plans is a primary concern. Approximately 1.4 million travelers are expected to transit through the San Diego International Airport alone during the season, with over 8.9 million people predicted to drive at least 50 miles. The California Highway Patrol is advising travelers to stay vigilant, drive carefully through wet conditions, maintain visibility with headlights, and avoid flooded areas to ensure safety on the roads.
Background Context
An atmospheric river, often dubbed the “Pineapple Express,” consists of a narrow, concentrated band of moisture in the atmosphere responsible for intense precipitation events. This current storm is drawing moisture from tropical areas southwest of the California coast, leading to forecasts of heavy rainfall and the potential for flooding. Forecasters emphasize the urgency of ensuring that residents are prepared for the severe weather expected during this festive season.
Recommendations for Residents
Residents are encouraged to take proactive steps to safeguard their homes and businesses:
- Stay Informed: Keep up to date with local forecasts and heed guidance from the National Weather Service.
- Prepare Properties: Secure outdoor belongings, clear gutters, and ensure that drainage systems are working effectively.
- Travel Smart: Plan for extra travel time, steer clear of flooded regions, and postpone any non-essential travel if possible during the storm’s peak.
Key Takeaways
By taking these steps and remaining informed, residents and travelers in Southern California can mitigate the potential effects of this significant weather event. Encouraging local entrepreneurial spirit and community participation will ensure a continued focus on resilience and adaptability, enabling businesses to thrive even in challenging climates.
Frequently Asked Questions (FAQ)
What is an atmospheric river?
An atmospheric river is a narrow, concentrated band of concentrated moisture in the atmosphere, often leading to heavy rainfall and potential flooding.
When is the storm expected to arrive?
The storm is forecast to begin affecting Southern California on Tuesday night, December 23, 2025, with rain continuing into Wednesday and Thursday.
What areas will be most affected?
Los Angeles, Ventura, Santa Barbara, and San Luis Obispo counties are expected to experience significant rainfall, with Orange County, the Inland Empire, and San Diego County also facing heavy rainfall on Wednesday.
What are the potential impacts of the storm?
Potential impacts include flooding, mudslides, and strong winds that could topple trees and power lines.
How can residents prepare?
Residents should stay informed by checking local weather forecasts, prepare their property by securing loose outdoor objects and ensuring drainage systems are clear, and plan travel wisely by allowing extra time and avoiding flooded areas.
Key Features of the Upcoming Storm
| Feature | Details |
|---|---|
| Storm Type | Atmospheric River (“Pineapple Express”) |
| Expected Rainfall | 80% chance of 2+ inches in downtown Los Angeles; up to 6 inches in some areas |
| Timing | Tuesday night, December 23, 2025, through Christmas Day |
| Impacts | Flooding, mudslides, strong winds up to 53 mph |
| Travel Considerations | Potential disruptions; plan accordingly |
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Author: STAFF HERE SAN DIEGO WRITER
The SAN DIEGO STAFF WRITER represents the experienced team at HERESanDiego.com, your go-to source for actionable local news and information in San Diego, San Diego County, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as Comic-Con International, San Diego County Fair, and San Diego Pride Festival. Our coverage extends to key organizations like the San Diego Regional Chamber of Commerce and United Way of San Diego County, plus leading businesses in biotechnology, healthcare, and technology that power the local economy such as Qualcomm, Illumina, and Scripps Health. As part of the broader HERE network, including HEREAnaheim.com, HEREBeverlyHills.com, HERECostaMesa.com, HERECoronado.com, HEREHollywood.com, HEREHuntingtonBeach.com, HERELongBeach.com, HERELosAngeles.com, HEREMissionViejo.com, and HERESantaAna.com, we provide comprehensive, credible insights into California's dynamic landscape.
