A powerful atmospheric river is barreling toward California, bringing with it a dangerous mix of heavy rain, fierce winds, and major flooding concerns. Weather officials warn that this storm system could overwhelm rivers, cause mudslides in wildfire-scarred areas, and bring near-blizzard conditions to the Sierra Nevada.
Meteorologists are closely monitoring the storm, which is expected to intensify by Wednesday night and peak through Thursday, delivering some of the heaviest rainfall the state has seen in months.
Residents across Northern, Central, and Southern California should prepare for potential road closures, power outages, and dangerous flash flooding as the storm takes aim.
What is an Atmospheric River and Why is It Dangerous?
An atmospheric river is a narrow but intense corridor of moisture in the sky, essentially acting like a river in the atmosphere that transports massive amounts of water vapor from the Pacific Ocean. When this moisture-laden system hits land, it unleashes torrential rain and heavy snow, often leading to severe weather events.
These storms are capable of dumping multiple inches of rain within hours, creating flash flooding, mudslides, and dangerous road conditions. This incoming system has the potential to cause widespread damage, especially in areas that have already experienced heavy rainfall earlier this season.
Breaking Down the Impacts: What to Expect
Northern California: Winds and Heavy Rain Could Bring Widespread Disruptions
- The Bay Area and surrounding regions will start seeing steady rain and high winds by Wednesday night, with gusts reaching up to 80 mph in coastal areas and higher elevations.
- The Sierra Nevada is expected to receive up to five feet of snow, creating dangerous whiteout conditions for travelers.
- Power outages are likely as strong winds knock down trees and power lines.
Central and Southern California: Flooding and Landslides Are the Biggest Threats
- The Central Coast could see between 4 and 8 inches of rain, significantly raising the risk of flooding and mudslides.
- Areas recently burned by wildfires are at high risk for fast-moving debris flows, which can be catastrophic for nearby homes and roads.
- Southern California, including Los Angeles and San Diego, is expected to experience heavy rain and urban flooding on Thursday afternoon into Friday morning.
Major Hazards and How to Stay Safe
This storm carries multiple threats, and officials are urging residents to prepare now to reduce risks.
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Flooding – Low-lying areas and urban streets could flood quickly, especially near rivers and creeks.
- What to do: Avoid driving through flooded roads, have sandbags ready if you live in a flood-prone area, and keep an eye on evacuation alerts.
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Debris Flows and Mudslides – Areas near recent wildfire burn scars face a high risk of landslides.
- What to do: If you live near hillsides or burned areas, stay alert for evacuation orders and be ready to leave immediately if needed.
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Strong Winds – Gusts up to 80 mph could knock down power lines and trees, leading to power outages and travel delays.
- What to do: Charge phones and backup batteries, secure outdoor furniture, and be prepared for possible electricity disruptions.
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Travel Disruptions – Road closures, flight delays, and treacherous driving conditions are expected across the state.
- What to do: If you must travel, check road conditions before leaving and carry an emergency kit with food, water, and blankets in your car.
How Long Will This Last?
The worst of the storm is expected between Wednesday night and Friday morning, with rain and snow gradually tapering off into the weekend. However, with saturated ground and high river levels, flood risks could persist for days even after the heaviest rain ends.
Forecasters are also keeping a close eye on another potential storm next week, which could bring even more rain to already soaked areas.
Final Warnings: Don’t Underestimate This Storm
California has seen its fair share of strong storms, but this atmospheric river could be one of the most significant of the season. Authorities are urging residents to take precautions now, as conditions could worsen quickly with little warning.
