Severe Weather Threats Loom as Atmospheric River Storm Hits the West Coast

As an atmospheric river-fueled storm makes its way across the West Coast, Southern California is bracing for heavy rain that poses significant risks of mudslides and debris flows. This storm, which began impacting the region early Wednesday, has already led to evacuation orders in Los Angeles and surrounding areas, and its effects are expected to escalate as the week progresses.

The storm is forecasted to develop into a formidable March powerhouse, putting millions at risk of a variety of weather hazards, including wildfires, severe thunderstorms, tornadoes, powerful winds, and blizzard conditions.

On Wednesday, rain began to soak the Pacific Northwest, with showers reaching Northern California before dawn. By the afternoon, heavy rain and mountain snow were reported in Northern California, and Southern California was set to experience significant rainfall overnight into Thursday. The Weather Prediction Center has issued a level 2 of 4 risk for flooding from Santa Barbara to Los Angeles, particularly in areas affected by recent wildfires, such as the Palisades and Eaton burn scars. Authorities have urged residents in these vulnerable areas to prepare for potential evacuations.

In response to the impending storm, California Governor Gavin Newsom has mobilized over 400 state personnel to assist with preparations. Evacuation orders are currently in effect for approximately 120 homes near the Palisades burn scar, alongside additional warnings for over 1,700 residents in the Sierra Madre area. Officials have cautioned that debris flows from the burn areas could occur, prompting immediate evacuation commands for those in the most at-risk zones.

As the storm continues its march eastward, it is expected to bring snow and rain across a wider area, reaching much of the Rockies by Thursday evening. Mountainous regions could see snowfall accumulation of six inches or more, while lower elevations may receive several inches. The combination of rain, snow, and strong winds—gusting up to 50 mph—will create hazardous travel conditions.

By Friday, the storm is predicted to intensify, leading to severe thunderstorms across the central United States. Wind gusts could reach 65 mph or more, raising fire dangers in areas like eastern New Mexico and the Southern Plains. The Storm Prediction Center has warned that the confluence of a potent cold front and warm, moist air could lead to severe thunderstorms capable of producing tornadoes and large hail.

The situation will escalate further on Saturday, as severe thunderstorms and blizzard conditions sweep through the eastern U.S. Early morning storms may impact the Ohio Valley, with additional rounds of dangerous weather expected in the afternoon across the Gulf Coast and Southeast. Heavy rainfall could lead to flash flooding, particularly from Mississippi to northern Georgia.

As the storm system moves through, it is crucial for residents in affected areas to remain vigilant and prepared for rapidly changing conditions. The potential for nighttime tornadoes adds an extra layer of danger, as these events are statistically more likely to result in fatalities compared to daytime occurrences.

By Sunday, the East Coast can expect a continuation of wet and stormy weather, although the intensity of the storms is expected to diminish compared to the preceding days.

As this powerful storm continues to unfold, officials urge everyone to stay informed and heed evacuation orders and warnings to ensure safety amidst the severe weather threats.