The series of atmospheric rivers continued across Southern California in early January of 2023. Widespread rain and high-elevation snow occurred, leading to several instances of rock and mud slides, as well as a swiftwater rescue near Palm Springs. Very high surf and coastal flooding occurred across Orange and San Diego County Beaches.

High Surf in ORANGE COUNTY COASTAL, CALIFORNIA
From 05-JAN-23 12:00:00 to 06-JAN-23 18:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High surf was reported at Orange County Beaches, with tide overflowing onto the Pacific Coast Highway. Elevated to high surf of 5 to 9 feet was reported by early afternoon on January 5, with sets of 8 to 12 feet reported on the afternoon on January 6. Surf slowly diminished through the day on January 7.

High Surf in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 05-JAN-23 12:00:00 to 06-JAN-23 18:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

High surf was reported at San Diego County Beaches, with high tide resulting in the closure of the Ocean Beach Pier. Elevated to high surf of 4 to 8 feet was reported by early afternoon on January 5, with sets of 8 to 12 feet reported in the morning on January 6. Surf slowly diminished through the day on January 7.

Flash Flood in RIVERSIDE, CALIFORNIA
From 05-JAN-23 06:00:00 to 05-JAN-23 12:00:00 (PST-8)
Location: PALM SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Swiftwater rescue of two vehicles stuck in wash on North Indian Canyon Drive near Sunrise Parkway. Whitewater and Morongo Canyon (Whitewater Trout Farm) and Lower Snow Creek received 0.5-1 inch from 6am-12pm. Video of vehicles in lower water crossing submerged in flowing water.

Debris Flow in SAN BERNARDINO, CALIFORNIA
From 05-JAN-23 07:00:00 to 05-JAN-23 16:00:00 (PST-8)
Location: RUNNING SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Widespread moderate rainfall occurred across the San Bernardino County Mountains on January 5, from the early morning through the mid-afternoon hours. Multiple instances of debris flows were recorded, with mud and large rocks/boulders covering portions of Highway 330 and large boulders on Highway 38. Often, these were the result of the repeated freeze, snow, thaw and rain in the mountains this winter, with small amounts of rain then causing the movement of boulders.

Heavy Snow in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 05-JAN-23 16:00:00 to 08-JAN-23 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

High-elevation snowfall occurred across the San Bernardino County Mountains from early January 5-January 6. Snow levels generally remained above 7,000 feet, but several inches of accumulation were noted as low as 6,000 feet. Snow amounts of 2-8 inches were received above 7,000 feet, with accumulations of 2-4 inches as low as 6,000 feet.

High Wind in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 04-JAN-23 23:00:00 to 05-JAN-23 13:00:00 (PST-8)
Magnitude: 72.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong winds occurred across the San Bernardino County Mountains late January 4 through the morning of January 5. Widespread wind gusts of 35-55 mph were recorded, with several notable gusts listed below:
Mesonet station 424SCE Silverwood Lake reported a peak wind gust of 72 mph.
Burns Canyon reported a peak wind gust of 72 mph.
Mesonet station Cajon Lookout SCE338 reported a peak wind gust of 64 mph.