Tropical Storm Rachel Triggers Flood Watches in San Diego and Utah

Key points

• San Diego County has a tropical storm watch in effect for the coast, valleys, mountains, and deserts, with a coastal flood advisory through 2 p.m. Tuesday.
• San Diego is projected to receive up to one inch of rain from Saturday through Tuesday, with peak rainfall possible on Sunday in mountain and desert areas.
• Utah expects 0.4 to 3 inches of rain depending on the region, with the Wasatch Front potentially receiving 0.75 to 1.5 inches.
• Wind gusts up to 45 mph are expected in San Diego's mountain and desert regions, while coastal areas may see gusts up to 30 mph.
• The storm's path is uncertain, with models showing variability in rainfall totals due to the interaction with a low-pressure system from the Pacific Northwest.

Background

Rachel formed in the Pacific late last month and reached hurricane status on September 30, peaking at Category 2. It caused flooding in Mexico before moving toward the U.S. West Coast. This event follows an unusually active Pacific hurricane season, attributed to El Niño conditions that have warmed ocean waters and fueled storm development. In August 2023, Tropical Storm Hilary similarly affected San Diego, causing $900 million in damage and three deaths, including one in California.

How outlets are covering it

NBC 7 San Diego emphasizes the immediate local impacts, highlighting the tropical storm watch, coastal flood advisory, and specific wind and rain projections for San Diego County. KSL News focuses on the broader regional impact, particularly in Utah, where the storm's remnants are expected to provide critical moisture for drought-stricken areas but also pose flooding risks. KSL notes that while the rain is beneficial for soil moisture and snowpack, the exact totals are uncertain due to the storm's path. Both outlets agree on the potential for flash flooding and the importance of monitoring weather updates, but KSL places greater emphasis on the long-term benefits for Utah's water supply, while NBC 7 focuses on immediate safety measures like free sandbag distribution.

Why it matters

The storm highlights the increasing frequency and intensity of Pacific hurricanes due to El Niño, which can lead to significant economic and environmental impacts. For San Diego, the risk of coastal and flash flooding threatens infrastructure and public safety. For Utah, the rainfall is a double-edged sword, offering relief from severe drought but also posing flood risks in urban and natural areas. The event underscores the need for preparedness and adaptive strategies in regions vulnerable to extreme weather events.

What to watch

Residents in San Diego and Utah should monitor weather updates and heed flood warnings. San Diego County is distributing free sandbags to prepare for potential flooding. In Utah, the National Weather Service is evaluating whether to issue flood watches as the storm's remnants move through the state. The exact rainfall totals will depend on Rachel's path, with models showing variability. Residents in low-lying coastal areas and flood-prone zones should take precautions, and those in drought-affected areas should monitor soil moisture levels for potential benefits.