Southern California to Remain Humid with Isolated Storms Possible Through Weekend
LOS ANGELES – southern California residents can expect continued muggy conditions and a slight chance of isolated showers and thunderstorms through at least the weekend, according to the National Weather Service.A pattern drawing tropical moisture from the pacific is creating an unstable atmosphere, despite not promising meaningful rainfall for the Los Angeles area.
The highest probability of precipitation is Tuesday and Wednesday, primarily east and north of L.A. County, focusing on santa Barbara County.Meteorologist Bryan Lewis of the National Weather Service in Oxnard stated that total rainfall is expected to be “less than a half an inch” with L.A. County potentially receiving even less, or none at all. However, Lewis emphasized that the increased humidity will be noticeable even without substantial rainfall.
The National Weather Service Los Angeles (@NWSlosangeles) tweeted on September 21, 2025, that showers and thunderstorms are possible anytime through Wednesday, with the highest chances occurring Tuesday afternoon through Wednesday afternoon. They advise continued monitoring for updates.
Last week, remnants of tropical Storm Mario brought approximately a tenth of an inch of rain to most of los Angeles County on Thursday. However, some areas experienced intense, localized rainfall, resulting in minor flooding in Twentynine Palms and dangerous mud and debris flows in the San bernardino County mountains, trapping motorists. Angelus Oaks and idyllwild recorded almost an inch of rain, while Big Bear Lake received three-quarters of an inch.
Lewis noted that the current low-pressure system pulling in tropical moisture is weaker than the one that brought Tropical Storm MarioS remnants. A brief dry period is anticipated Thursday, but additional showers are possible Friday and Saturday.
Looking ahead, there is a potential for new storm growth as early as Sunday with Tropical Storm Narda, currently developing off the coast of southern Mexico. Lewis explained that as Narda moves northwest,it “could funnel more moisture in.”
