An atmospheric river impacted Southern California right before Christmas 2021 with heavy rain, high elevation snow, and windy conditions. Some areas reported over 5 inches of rainfall. This led to flooding, debris flows and closed roads.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: PALOMAR MTN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station PRMC1 Palomar Mountain reports 5.89 inches of rain in the past 24 hours.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: MT LAGUNA AFS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station MLGC1 Mt. Laguna observatory raws observes 2.93 inches of rainfall in the past 24 hours.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: TEMECULA RNCH CAL AR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet FBOC1 reports 3.46 inches total of rain in the past 24 hours.

Heavy Rain in ORANGE, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: OLIVE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public measures 1.75 inches of storm total rainfall in northeast Orange, CA.

Heavy Rain in ORANGE, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: SILVERADO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet SDOC1 Silverado Canyon measures 2.87 inches of storm total rainfall.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: ARCILLA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reports 2.65 inches of storm total rainfall.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: CORONA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS station ca-rv-78 in Corona measures 3.17 inches of rain in past 24 hours.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: ONTARIO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station GW0529 in Ontario reports 3.59 inches of rain in the past 24 hours.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: FONTANA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet RLOC1 Rialto reports 3.9 inches of rainfall in the past 24 hours.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: DEVORE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet DVOC1 reports 6.19 inches of rain in past 24 hours.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: WRIGHTWOOD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station 1877D wrightwood reports 4.38 inches of rain in the past 24 hours.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: SCOTLAND
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet MLFC1 Lytle Creek 7.66 storm total rainfall.

Heavy Rain in SAN BERNARDINO, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: BIG BEAR LAKE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

COOP observations station BBLC1 reports 6.03 inches total of rain in the past 24 hours.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: CABAZON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station UPSC1 upper Snow Creek reports 6.03 inches of rain in the past 24 hours.

Heavy Rain in RIVERSIDE, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Location: CHERRY VLY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station BEUC1 in Beaumont reports 2.62 inches of rain in the past 24 hours.

Heavy Snow in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 10:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Caltrans reports several vehicles stuck in the snow on State Route 38 near Rainbow Ln. 3 inches snow measured around 8,000 ft elevation.

Flood in SAN DIEGO, CALIFORNIA
From 24-DEC-21 00:00:00 to 24-DEC-21 15:00:00 (PST-8)
Location: (SAN)SAN DIEGO INTL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The 1st ave on ramp to Interstate 5 flooded. heavy shower occurred at 11 am.

Flood in SAN DIEGO, CALIFORNIA
From 24-DEC-21 00:00:00 to 24-DEC-21 12:00:00 (PST-8)
Location: DEL DIOS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Rocks in roadway per Caltrans CHP. Heavy rain reported at 8 am.

Flood in ORANGE, CALIFORNIA
From 23-DEC-21 19:00:00 to 24-DEC-21 00:00:00 (PST-8)
Location: EL TORO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

El Toro road on-ramp to I-5 flooding. Vehicle stuck water.

Flood in ORANGE, CALIFORNIA
From 24-DEC-21 08:00:00 to 24-DEC-21 12:00:00 (PST-8)
Location: ESPERANZA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Route 91 west and Route 241 south connector 2 lanes flooded with 2 feet of water.

Flood in RIVERSIDE, CALIFORNIA
From 24-DEC-21 00:00:00 to 24-DEC-21 13:00:00 (PST-8)
Location: PRADO DAM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Green river road area had lanes closed on this road and on Highway 91 due to flooding. 2.76 inches rainfall at Corona past 24 hours and 2.4 inches at Prado dam.

Flood in RIVERSIDE, CALIFORNIA
From 24-DEC-21 04:00:00 to 24-DEC-21 15:00:00 (PST-8)
Location: MAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooded hov lane 1 on highway 91. 2.5 inches of rain in this area past 24 hours.

Flood in SAN BERNARDINO, CALIFORNIA
From 24-DEC-21 00:00:00 to 24-DEC-21 15:00:00 (PST-8)
Location: CRESTLINE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Department of Highways

Caltrans reported all lanes closed in both directions on Route 18 from upper waterman to mormon rock just below Route 138 due to boulders in the road and washed out roads. Highway 18 was closed in lower waterman canyon in the morning due to road partially washed out and guardrail hanging. Several gauges on Route 18 reported 5 to 6 inches rainfall past 24 hours.

Flood in RIVERSIDE, CALIFORNIA
From 23-DEC-21 16:00:00 to 24-DEC-21 00:00:00 (PST-8)
Location: CABAZON
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Department of Highways

Caltrans reports flooded roads with some vehicles stuck in water at the intersection of seminole drive and main street in cabazon.

Flood in RIVERSIDE, CALIFORNIA
From 24-DEC-21 10:00:00 to 24-DEC-21 21:00:00 (PST-8)
Location: WHITE WATER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Road closures include indian canyon from tramview to palm road springs station road, gene autry from interstate 10 to east via escuela, araby drive through wash, vista chino from gene autry to cathedral city, elm street from bonita ave to adele ave, and part of seminole drive. 0.5 to 1.5 inches of rainfall and 2 to 3 inches across surrounding foothills. 1 inch rainfall reported at Palm Springs Airport.

Flood in RIVERSIDE, CALIFORNIA
From 24-DEC-21 08:00:00 to 24-DEC-21 14:00:00 (PST-8)
Location: BERMUDA DUNES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Varner road flooding near Interstate 10. 0.5 to 1.0 inch rainfall in northern Coachella Valley.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 24-DEC-21 00:00:00 to 25-DEC-21 00:00:00 (PST-8)
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Gusty winds occurred across the region with gusts over 50 MPH reported. 75 MPH wind report at Volcan Mountain.

High Wind in SAN DIEGO COUNTY VALLEYS, CALIFORNIA
From 24-DEC-21 00:00:00 to 25-DEC-21 00:00:00 (PST-8)
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Gusty winds occurred across the region with gusts over 50 MPH reported. 63 MPH wind report at Otay Mountain RAWS.

High Wind in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 24-DEC-21 00:00:00 to 25-DEC-21 00:00:00 (PST-8)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Gusty winds occurred across the region with reports over 50 MPH. Castle Rock Road station reported a 58 MPH wind gust.

High Wind in ORANGE COUNTY COASTAL, CALIFORNIA
From 24-DEC-21 00:00:00 to 25-DEC-21 00:00:00 (PST-8)
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station Weatherflow XHTG Huntington Beach pier reports 59 MPH wind gust  along line of heavy rainfall.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 15:00:00 (PST-8)
Location: RAMONA ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reports 1.5 inches of rain in Ramona.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 23-DEC-21 10:00:00 to 24-DEC-21 15:00:00 (PST-8)
Location: FALLBROOK COMM ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter has accumulated over 2 inches of rain since last night at 5pm. Also a few flashes of lightning and high winds.

Flood in ORANGE, CALIFORNIA
From 24-DEC-21 05:00:00 to 24-DEC-21 12:00:00 (PST-8)
Location: SEAL BEACH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter report, 0.40 inch of rain from thunderstorm between 6:10 and 6:35 a.m. with moderate street flooding westside seal beach. 30 mph wind estimated.