California Storm Revives New Year’s Flood and Debris Flow Threats

As the new year begins, California is bracing for a series of atmospheric river storms that threaten to bring flooding and debris flows across the state. Following the severe Christmas week storm, which left many areas saturated, the upcoming storm may intensify existing conditions rather than produce extreme rainfall totals.

Storm Details and Rainfall Projections

Light rain began in Southern California on Wednesday morning, with projections indicating heavier downpours arriving overnight. The National Weather Service in Los Angeles has warned that due to saturated soil, nearly all precipitation will become runoff, increasing the risk of flooding.

• Rainfall amounts expected in coastal and valley areas, including downtown Los Angeles: 1 to 3 inches.
• Foothills and mountains may receive between 2 to 5 inches.
• The storm will reach its peak intensity around midnight on New Year’s Eve, lasting through noon on New Year’s Day.

Evacuation Warnings and Safety Preparations

California Governor Gavin Newsom has activated crews and equipment in anticipation of the storm’s impact, especially in Los Angeles and Ventura counties. Evacuation warnings have been issued for areas recently affected by wildfires, notably in Los Angeles County. These warnings affect regions such as the greater Wrightwood area, which suffered severe damage from debris flows during the Christmas storm.

Residents were forced to evacuate as mudslides engulfed homes and vehicles. Currently, no mandatory evacuations have been ordered in Wrightwood itself, but nearby areas in Los Angeles County are under alert.

Impact on New Year’s Celebrations and Events

The timing of the storm poses challenges for the 137th Tournament of Roses Parade in Pasadena. This event is expected to experience its first rain since 2006, affecting attendees camping along the parade route.

Future Weather Patterns

This storm system is just the first of three that could impact California in the days leading up to early next week. A shift in weather is expected late Friday into Saturday, bringing colder air and significant snowfall to higher elevations. Major passes, such as Interstate 80 through Donner Pass, could see over a foot of snow, raising concerns about hazardous mountain travel.

In recent weeks, the Mammoth Mountain Ski Area experienced a tragic avalanche, resulting in a ski patroller’s death and injuries to another, underscoring the dangers of winter weather conditions.

As California navigates this turbulent weather, residents are urged to stay informed and take necessary precautions against potential flooding and debris flow threats.