A strong winter storm starting in late December 2022 carried over into January 2023, bringing heavy rain and mountain snow to southern California.

Debris Flow in SAN DIEGO, CALIFORNIA
From 01-JAN-23 06:30:00 to 01-JAN-23 07:00:00 (PST-8)
Location: RANCHO SANTA FE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans report of a mudslide leading to rocks and dirt blocking eastbound lanes on Via de Santa Fe near Rancho Santa Fe.

Debris Flow in SAN DIEGO, CALIFORNIA
From 01-JAN-23 07:15:00 to 01-JAN-23 07:45:00 (PST-8)
Location: RAMONA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans report of a mudslide on Old Julian Highway by MM 4.5.

Debris Flow in SAN DIEGO, CALIFORNIA
From 01-JAN-23 17:30:00 to 01-JAN-23 18:00:00 (PST-8)
Location: SANTA YSABEL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans report of a 4' X 5' boulder on Highway 78 by Wynola Road.

Heavy Snow in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 01-JAN-23 00:00:00 to 01-JAN-23 18:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Various reports of heavy snow received from San Bernardino County Public Works, broadcast media, and trained spotters. Totals ranged from around 4 inches of snow near Arrowbear Lake to 7 inches near Big Bear Lake, and upwards of 10 inches near Running Springs.

Flash Flood in SAN DIEGO, CALIFORNIA
From 01-JAN-23 00:45:00 to 01-JAN-23 00:45:00 (PST-8)
Location: SAN LUIS REY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flash flooding on College Avenue near SR76 reported by CalTrans. Full highway closure with disabled vehicles due to water up to 2.5 feet deep. Rainfall rates of 0.84 inch per hour occurred in the area, per observations from KCRQ ASOS.

Debris Flow in RIVERSIDE, CALIFORNIA
From 01-JAN-23 20:40:00 to 01-JAN-23 21:15:00 (PST-8)
Location: CABAZON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans report of rocks and debris in roadway on Seminole Drive at Main Street in Cabazon.

Debris Flow in RIVERSIDE, CALIFORNIA
From 01-JAN-23 20:50:00 to 01-JAN-23 21:20:00 (PST-8)
Location: LAKELAND VLG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans report of basketball-sized boulders on Ortega Highway near the Ortega Oaks Candy Store.

Strong Wind in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 01-JAN-23 09:30:00 to 01-JAN-23 10:30:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Newspaper

Newspaper reported a palm tree fell and crushed a parked Toyota Tundra due to strong winds estimated about 40 mph. The truck was parked in the 900 block of 8th street in Coronado. Time estimated.

Strong Wind in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 01-JAN-23 07:30:00 to 01-JAN-23 08:30:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Newspaper

Newspaper report of multiple trees down along Carlsbad Village Drive and Highland Drive due to wind gusts estimated around 40 mph. Time estimated.

Flood in SAN DIEGO, CALIFORNIA
From 01-JAN-23 06:00:00 to 01-JAN-23 08:00:00 (PST-8)
Location: NESTOR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans report of flooding on the Palm Ave off-ramp lanes on I-5 in Imperial Beach.

Flood in SAN DIEGO, CALIFORNIA
From 01-JAN-23 18:00:00 to 01-JAN-23 20:00:00 (PST-8)
Location: VALLEY CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Report received from CalTrans. Woods Valley Road near Valley Center was flooded in both lanes due to rainwater runoff and poor drainage.

Flash Flood in RIVERSIDE, CALIFORNIA
From 01-JAN-23 15:15:00 to 01-JAN-23 17:15:00 (PST-8)
Location: VALLE VISTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Rainfall rates of 0.5 to 0.8 inches per hour were observed in this area between 4 and 5 PM. Total rainfall of 1.30 inches occurred just west of Cranston Station near Valle Vista at Blackburn Road and State Highway 74. Flooding occurred at this location around 2:30 PM as well.

Flood in SAN DIEGO, CALIFORNIA
From 01-JAN-23 00:00:00 to 01-JAN-23 01:00:00 (PST-8)
Location: OCEANSIDE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans report of flooding in the right lane on I-5 South near Oceanside.

Flood in SAN DIEGO, CALIFORNIA
From 01-JAN-23 00:00:00 to 01-JAN-23 01:00:00 (PST-8)
Location: CARLSBAD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of flooding on SR78 West on the on-ramp to I-5 North.

Flood in SAN DIEGO, CALIFORNIA
From 01-JAN-23 01:00:00 to 01-JAN-23 02:00:00 (PST-8)
Location: OCEANSIDE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of flooding on SR76 at I-5. Water was reported to be up to 2.5 feet deep.

Flood in SAN DIEGO, CALIFORNIA
From 01-JAN-23 02:00:00 to 01-JAN-23 03:00:00 (PST-8)
Location: ENCANTO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding reported in all lanes on SR94 West at College Ave. A vehicle was stuck and flooded out on the right shoulder.

Flood in SAN DIEGO, CALIFORNIA
From 01-JAN-23 05:30:00 to 01-JAN-23 06:30:00 (PST-8)
Location: CAMP ELLIOT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans report of flooding on the Mount Soledad Freeway near the I-15 on-ramp.

Flood in SAN DIEGO, CALIFORNIA
From 01-JAN-23 06:00:00 to 01-JAN-23 08:00:00 (PST-8)
Location: PALM CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans report of flooding on the Palm Ave off-ramp lanes on I-5 near Imperial Beach.

Flood in SAN DIEGO, CALIFORNIA
From 01-JAN-23 08:30:00 to 01-JAN-23 10:30:00 (PST-8)
Location: OVERLOOK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Per an NWS Storm Survey, levels on the San Diego River at Fashion Valley reached up to 10.2 feet. Fashion Valley Road had 1 foot of flowing water and was closed. Avenida Del Rio had 2 feet of flowing water and was closed. The entire lower parking structure at the Fashion Valley Mall was filled with 1 to 2 feet of water. Mission Center Road was closed but did not have flowing water. Riverwalk Golf Driving Range was filled with water. San Diego Mission Road had minor water flow debris at crossing, but was open.

Flood in SAN DIEGO, CALIFORNIA
From 01-JAN-23 18:00:00 to 01-JAN-23 20:00:00 (PST-8)
Location: VALLEY CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans report - Woods Valley Road near Valley Center was flooded in both lanes due to rainwater runoff and poor drainage.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 01-JAN-23 00:00:00 to 01-JAN-23 20:00:00 (PST-8)
Location: SAN YSIDRO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy rain fell across much of San Diego County on January 1st. Per reports from NWS Employees and other trained spotters rainfall totals of 1-3 inches fell across much of the county through the evening hours on the 1st.

Heavy Rain in ORANGE, CALIFORNIA
From 01-JAN-23 00:00:00 to 01-JAN-23 08:00:00 (PST-8)
Location: LAGUNA HILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported storm total rainfall of 1.4 inches through about 8 AM.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 01-JAN-23 00:00:00 to 01-JAN-23 08:00:00 (PST-8)
Location: DEL ROSA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported 1.78 inches of heavy rain occurring at their location through about 8 AM on the 1st.

High Wind in SANTA ANA MOUNTAINS AND FOOTHILLS, CALIFORNIA
From 01-JAN-23 00:00:00 to 01-JAN-23 06:00:00 (PST-8)
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

High winds impacted the Santa Ana Mountains early on January 1st. The Fremont Canyon RAWS site recorded a peak wind gust of 71 mph.

High Wind in SAN GORGONIO PASS NEAR BANNING, CALIFORNIA
From 01-JAN-23 00:00:00 to 01-JAN-23 12:00:00 (PST-8)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds impacted the San Gorgonio Pass early on January 1st. The Cabazon SoCal-Edison site recorded a peak wind gust of 59 mph on the morning of January 1st.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 01-JAN-23 00:00:00 to 01-JAN-23 15:00:00 (PST-8)
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds impacted the San Diego County Mountains during the morning and afternoon hours on January 1st. The Boulevard West SDG&E site recorded a peak wind gust of 67 mph, with gusts of 50-65 mph elsewhere.