Tropical Storm Rachel Approaches Southern California With Widespread Rain and Embedded Storms Expected Saturday Night Into Sunday Morning
San Diego, California – Southern California and parts of the Desert Southwest are bracing for an unusual weather event this weekend as Tropical Storm Rachel approaches from the south. Widespread rain and embedded thunderstorms are expected to increase across the region Saturday night into Sunday morning, with the heaviest rain focused near San Diego, the Inland Empire, and the mountains and deserts to the east. Moisture from the storm is also expected to spread into Nevada and Arizona.
Rachel Moving Toward the Southern California Coast
Forecast model simulations for overnight Saturday into early Sunday show the center of Tropical Storm Rachel sitting just off the coast of northern Baja California, southwest of San Diego and west of Ensenada. Bands of rain are shown wrapping around the storm and spreading north across San Diego County, Orange County, Los Angeles County, and the Inland Empire.
Some of the most intense rain is shown near the coast around San Diego and Tecate, close to the U.S.-Mexico border, where heavy rain bands could bring torrential downpours for a period of time.
Widespread Rain Across Southern California
The rain is expected to cover a wide area of Southern California, reaching Los Angeles, Irvine, Oceanside, Palmdale, Santa Barbara, and inland toward Indio and the Coachella Valley. Rain is also forecast to spread north into the high desert, including areas near California City and Ridgecrest, and into the southern San Joaquin Valley near Bakersfield.
Embedded thunderstorms could bring heavy downpours, lightning, and gusty winds at times, especially in the mountains and deserts.
Storms Spreading Into Nevada and Arizona
Moisture from Rachel is also expected to stream north and east into the Desert Southwest. Scattered storms and heavier rain are shown across southern Nevada, including the Las Vegas area, and into western Arizona, near Kingman, Lake Havasu City, Parker, and Blythe.
Farther east, storms could develop near Prescott, Flagstaff, and the Phoenix area, including Buckeye and Gilbert, as well as parts of southern Arizona near Tucson and Nogales.
A Rare Event for Southern California
Tropical storms reaching Southern California are rare. Cooler ocean waters off the California coast usually weaken tropical systems quickly before they can reach the region. However, in some cases, the remnants or even a weakened tropical storm can move close enough to bring significant rain and gusty winds. In August 2023, Tropical Storm Hilary brought record-breaking rain and flooding to parts of Southern California and the Desert Southwest, showing just how impactful these storms can be.
Flash Flooding Is the Biggest Concern
The biggest threat from Rachel is flash flooding. Southern California’s dry ground does not absorb water quickly, especially after a long, hot summer. When heavy rain falls, water can run off rapidly into streets, washes, canyons, and riverbeds, which can fill up within minutes.
Areas of special concern include mountain communities, desert washes, and recent burn scars, where heavy rain can trigger mudslides and debris flows. Residents living near burn areas should be prepared to leave quickly if officials issue warnings.
Never Drive Through Flooded Roads
One of the most important safety messages during heavy rain is to never drive through flooded roads. Just a few inches of moving water can cause a vehicle to lose control, and deeper water can sweep vehicles away. This is especially dangerous in desert washes and low-water crossings, which can flood very quickly even if it is not raining directly overhead.
Gusty Winds and Rough Surf
Along with heavy rain, Rachel could bring gusty winds, especially along the coast and in the mountains. Coastal areas may also see rough surf, high waves, and dangerous rip currents. Beachgoers should stay out of the water and follow warnings from lifeguards and local officials.
Travel Impacts
Heavy rain and storms could make travel difficult on major highways, including Interstate 5, Interstate 8, Interstate 10, Interstate 15, and Interstate 40. Drivers should expect wet roads, reduced visibility, and possible road closures due to flooding. Anyone traveling between Southern California, Las Vegas, and Arizona this weekend should check road conditions before heading out.
How to Prepare
Residents should prepare now by clearing storm drains and gutters, securing outdoor items, and charging phones and backup batteries. Anyone living in flood-prone areas should know where they would go if water begins to rise. Keeping flashlights, water, and non-perishable food on hand is also a good idea in case of power outages.
Stay Updated
Conditions could change quickly as Rachel approaches. Residents should follow updates from the National Hurricane Center and local officials throughout the weekend.
For more California and Southwest weather updates and tropical coverage, stay with bchssreport.com.