An atmospheric river that drenched Southern California over the last few days has brought evacuations, mudslides, power outages and road flooding, but it has also generated some eye-popping rainfall totals.
And the rain isn’t quite over yet. Forecasters say there’s likely to be some lingering showers passing through the region Wednesday night, including from a new, colder system moving in. It is expected to bring the heaviest additional rainfall — from 1 to 2 inches — to San Diego, San Bernardino and Riverside counties.
Rain totals in parts of the Santa Monica and San Gabriel mountains topped 13 inches as of late Tuesday, including in Bel-Air (13.04 inches) and Topanga (13.48), according to the National Weather Service’s latest counts.
The rain easily broke daily records on both Sunday and Monday, dumping nearly half the average seasonal precipitation in just two days, according to a weather service analysis.
And while no rainfall records were doused Tuesday, downtown Los Angeles did tally a whopping 8.66 inches of rain over a four-day period ending at 9 p.m. Tuesday.
The bulk of that rain, however, fell over a three-day stretch from Sunday to Tuesday, during which 8.51 inches fell on downtown Los Angeles.
That’s the second-highest amount of rain in such a span in downtown L.A. since the weather service began keeping records in 1877. The tally is bested only by a storm in 1938 that delivered 9.21 inches in three days, said John Dumas, a meteorologist with the National Weather Service in Oxnard.
The February rainfall average for downtown is 3.80 inches.
“This is about an every 50-year kind of event,” Dumas said.
Downtown L.A. has now recorded the seventh wettest February on record, with 10.2 inches of rain having fallen over just the first six days of this month. The all-time record for the wettest February came in 1998, when 13.68 inches fell.
Since Oct. 1, the beginning of the water year, downtown L.A. has reported 15.43 inches of rain. That’s 118% of its average annual rainfall. The precipitation it normally gets annually averages 14.25 inches, Dumas said.
The recent storm totals mean that downtown L.A. has now received more than a year’s worth of rain since the 2023-24 water season began Oct. 1.
On Sunday, 4.1 inches of rain fell in downtown L.A., representing the rainiest calendar day the area has seen since Dec. 28, 2004, when 5.5 inches of rain fell.
Here are the highest rain tallies for select cities across Southern California as of 9 p.m. Tuesday. The totals include rain that began late Saturday, according to the National Weather Service.
Los Angeles County
- Santa Monica Mountains, at the Topanga fire station: 13.48 inches
- Bel-Air: 13.04 inches
- Woodland Hills: 12.62 inches
- San Gabriel Dam: 10.94 inches
- Porter Ranch: 10.64 inches
- Agoura Hills: 9.40 inches
- Beverly Hills: 9.35 inches
- Alhambra: 9.06 inches
- Van Nuys Airport: 8.79 inches
- Downtown Los Angeles: 8.66 inches
- Pasadena: 8.64 inches
- Sierra Madre: 8.61 inches
- Calabasas: 8.39 inches
- Culver City: 8.32 inches
- Hollywood Reservoir: 8.16 inches
- Northridge: 7.81 inches
- Newhall: 7.72 inches
- Chatsworth Reservoir: 7.53 inches
- La Cañada Flintridge: 7.36 inches
- Eagle Rock Reservoir: 7.21 inches
- Santa Monica: 7.18 inches
- Canoga Park: 7.05 inches
- Los Angeles International Airport: 5.47 inches
Areas with higher elevation saw greater totals as the hills and mountains act as a ramp to push air up and squeeze out the storm’s moisture.
Meanwhile, cities along the coast recorded some of the lowest totals, with 4.42 inches reported at Leo Carrillo State Park.
Santa Barbara and Ventura counties:
- Matilija Canyon near Ojai: 9.37 inches
- Thousand Oaks: 7.65 inches
- Santa Barbara: 5.43 inches
- Ojai: 4.48 inches
- Santa Barbara Airport: 3.51 inches
- Oxnard Civic Center: 3.38 inches
- Carpinteria: 3.34 inches
San Diego, Orange, Riverside and San Bernardino counties
- Lytle Creek: 13.99 inches
- Santiago Peak: 9.96 inches
- Cal State San Bernardino: 8.39 inches
- Coto de Caza: 7.40 inches
- San Onofre: 7.28 inches
- Garden Grove: 5.44 inches
- Prado Dam: 4.74 inches
Times staff writer Rong-Gong Lin II contributed to this report.
