San Diego is under a rare tropical storm watch as Tropical Storm Rachel approaches Mexico’s northern Baja California Peninsula, threatening Southern California and parts of the Desert Southwest with heavy rainfall, flash flooding, powerful winds and coastal flooding.
The storm is forecast to make landfall early Sunday morning, bringing potentially dangerous weather conditions to communities across the region. San Diego has only been placed under a tropical storm watch once before, during Hurricane Hilary in 2023.
Flash Flooding Threatens Southern California and Nevada
A Level 3 out of 4 threat for flooding rainfall has been issued for Saturday night through Sunday across parts of Southern California, southern Nevada, southwest Utah and northwest Arizona. The warning includes San Diego and Las Vegas, where numerous flash flood events and significant impacts are possible.
Both cities could receive an inch or more of rain. This would be approximately twice San Diego’s typical October rainfall and three times Las Vegas’ usual monthly total. Heavy downpours could trigger flash flooding, particularly in desert areas where the ground cannot quickly absorb large amounts of water.
Strong Winds Expected Across the Region
The strongest wind gusts around San Diego are expected early Sunday. Gusts could reach 25 to 40 mph in lower elevations and 50 to 70 mph in mountainous areas. Inland locations across Arizona, southern Nevada and Utah could experience gusts of 45 to 55 mph.
Wind speeds may change depending on Rachel’s track, with stronger gusts possible if the storm moves farther north.
Coastal Flooding and Dangerous Surf
Coastal flooding is another major concern, especially along beaches and areas already affected by high tides and powerful waves. Flooding could affect coastal roads and damage structures, particularly during high tides on Saturday and Sunday.
A coastal flood warning is in effect from the Malibu coast and Los Angeles County beaches to coastal San Diego County until Sunday afternoon.
The National Hurricane Center has also warned of life-threatening surf and rip currents along the coasts of Southern California and northern Baja California.
Residents should monitor official weather alerts, avoid flooded roads, stay away from dangerous surf and follow local emergency guidance as Tropical Storm Rachel moves through the region.