The National Hurricane Center has issued a Tropical Storm Watch for San Diego for only the second time ever as Tropical Storm Rachel threatens a rare approach to Southern California.
Forecasters say the system is expected to near the northern Baja California Peninsula or southern California late Saturday into early Sunday, raising flood and wind concerns across a wide stretch of the West.
The watch is historic for a reason. Pacific tropical systems almost never push this far north with enough punch to force official alerts on the California coast, and the only prior Southern California Tropical Storm Watch came ahead of Hurricane Hilary in 2023.
FOX Weather reported that Rachel is weakening over the Eastern Pacific, yet its moisture plume could still dump flooding rain, drive mountain snow, and deliver a rare late-season weather pattern across the West this weekend.
Rain is expected to begin Saturday across portions of California and the Southwest. The flood threat is forecast to ramp up on Sunday.
A level 2 out of 4 flash flood threat covers a large portion of the Southwest from Southern California to Utah, including Phoenix and Las Vegas. The FOX Forecast Center said 2 to 3 inches of rain is possible in those areas.
That rainfall would also ease the sweltering heat that has hammered Southern California all week. Strong gusty winds tied to Rachel are expected over interior Southwest higher terrain from this weekend into early next week, the National Hurricane Center said.
Moisture from the system may reach as far as Montana and help fuel a fall snowstorm across Montana and northern Wyoming, with some higher-elevation snow possible in the Sierra Nevada. The same Pacific moisture pattern has already put the West Coast under a weekend flooding-rain threat as Rachel’s remains push inland.
Hilary’s 2023 run offered a recent lesson. That storm brought heavy rain and flooding to the California desert and other parts of the Southwest after the last Tropical Storm Watch for the region.
The New York Post reported that Rachel could arrive early Sunday as a weaker post-tropical storm, with a possible landfall about 100 miles south of San Diego or a path shift as far north as Orange County.
A large weather system moving in from the northwest is expected to slow the storm, then turn and accelerate it toward Baja California and southern California. Cooler water and dry air should weaken it further, though the track remains unsettled.
The National Weather Service described that steering pattern in its latest advisory.
"This will cause Rachel to slow down and then turn and accelerate toward Baja California and southern California,"
Coastal hazards are already in the mix. An advisory warned of flooding in beach parking lots, boardwalks, and roads, with only isolated road closures expected, plus minor coastal erosion and strong rip currents from elevated surf.
"Flooding of beach parking lots, boardwalks, and roads with only isolated road closures expected. Minor coastal erosion is also expected. Additionally, elevated surf will lead to strong rip currents,"
San Diego residents know high surf and heat. A rare tropical moisture hit on top of that is a different test for drainage, roads, and emergency planning.
Rachel is not moving alone. Hurricane Isaias is expected to make landfall along the northern Gulf Coast late Friday, while Hurricane Simon was a Category 2 storm about 200 miles south of Manzanillo, Mexico, on Friday morning and is forecast to rapidly intensify before hitting Mexico’s coast as a major hurricane this weekend.
That dual setup means tropical systems could affect the Gulf and West coasts simultaneously by this weekend, something that has happened only twice since 1963. Coverage of how Isaias and Rachel’s remnants put both U.S. coasts under threat underscores how unusual the timing is.
FOX Weather Hurricane Specialist Bryan Norcross outlined Simon’s expected strength and track near Puerto Vallarta.
"It is forecast to intensify into a Category 4 before impacting the coast. It will pass close to Puerto Vallarta about Sunday,"
Norcross added a blunt note on the rarity for that stretch of coast.
"It's unusual for a hurricane to affect that city directly,"
Simon’s climb toward major-hurricane status fits a broader Pacific pattern in which Rachel’s earlier strengthening fed U.S. flood risk even as the storm later weakened over cooler water.
Isaias, meanwhile, has already forced Gulf Coast communities to brace for a late-Friday arrival, including the Florida Panhandle landfall risk tracked in recent hours.
For Southern California, the practical stakes are simpler than the maps. A second-ever Tropical Storm Watch means local officials and residents have little modern playbook beyond Hilary. Rain totals of a few inches can still flood freeways, fill desert washes, and knock out power when soils are dry and drainage is overloaded.
Winds over higher terrain, mountain snow farther inland, and a flash-flood threat reaching Phoenix and Las Vegas widen the impact zone well beyond the San Diego coastline. Beneficial cooling after a week of extreme heat does not cancel the flood and wind risk that follows.
Rare Pacific approaches do not care about political calendars. They test forecasts, infrastructure, and whether coastal cities treat a second-in-history watch with the seriousness it deserves.
