A frontal system accompanied by an atmospheric river moved into Southern California in the middle of December. This impacted the area by flooding and wind damage, as well as higher elevations receiving significant snowfall, where roads were impacted.

Flash Flood in RIVERSIDE, CALIFORNIA
From 14-DEC-21 12:00:00 to 14-DEC-21 20:00:00 (PST-8)
Location: CHERRY VLY
Flood cause: Heavy Rain / Burn Area
Property damage: 5.00K
Crop damage: 0.00K
Reported by: County Official

Vineland and Noble Streets in Beaumont area. 10+ foot long tree branches/trunks washing through as well and rocks larger than a foot round washing through the wash. Water flowing over 1 foot over crossing. Web cameras showing dark water flow and debris from Apple fire burn scar. Rainfall rates were as high as 0.60 per hour.

Heavy Snow in RIVERSIDE COUNTY MOUNTAINS, CALIFORNIA
From 14-DEC-21 00:00:00 to 15-DEC-21 19:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Park service measures 10 inches of snow at the top of the Palm Springs Tramway, elevation 8,400 feet.

Heavy Snow in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 14-DEC-21 00:00:00 to 15-DEC-21 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Department of Highways reports 12 inches of new snowfall in Green Valley Lake.

High Wind in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 14-DEC-21 00:00:00 to 15-DEC-21 12:00:00 (PST-8)
Magnitude: 74.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

High onshore winds occurred across the San Bernardino mountains. A wind gust of 85 MPH was reported at Silverwood Lake and an 84 MPH gust was reported at Heaps Peak near Lake Arrowhead.

High Wind in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 14-DEC-21 14:30:00 to 14-DEC-21 17:00:00 (PST-8)
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: County Official

Tree on powerline. Wind gusts 50 to 70 mph in this area on Tuesday. Power outages occurred on Greenbriar Drive in Lake Arrowhead.

High Wind in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 14-DEC-21 14:00:00 to 14-DEC-21 17:00:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reports large tree down on truck  on east side of Crestline. Wind reports near the area gusted near 50 MPH at the time.

Strong Wind in ORANGE COUNTY INLAND, CALIFORNIA
From 14-DEC-21 11:00:00 to 14-DEC-21 18:00:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Department of Highways

Large tree downed on Junipero Serra Road in San Juan Capistrano. Wind gusts 40 mph nearby sites. Widespread wind gusts occurred in southern inland Orange County.

High Wind in SAN GORGONIO PASS NEAR BANNING, CALIFORNIA
From 14-DEC-21 10:00:00 to 15-DEC-21 00:00:00 (PST-8)
Magnitude: 53.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Widespread wind gusts over 45 MPH. Whitewater RAWS reported a peak wind gust of 61 MPH.

Flood in SAN DIEGO, CALIFORNIA
From 14-DEC-21 16:00:00 to 14-DEC-21 20:00:00 (PST-8)
Location: SUNNY VISTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The bottom of Interstate 805 south to Bonita Road exit offramp was flooded.

Flood in SAN DIEGO, CALIFORNIA
From 14-DEC-21 12:30:00 to 14-DEC-21 18:30:00 (PST-8)
Location: NORTH PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding in the slow lane on Route 15 south and Route 94 near downtown San Diego. Area had rain rates of 0.60 inch an hour occurred.

Flood in SAN DIEGO, CALIFORNIA
From 14-DEC-21 12:30:00 to 14-DEC-21 16:30:00 (PST-8)
Location: (MYF)MNTGMRY FLD SAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A man and woman were swept into the San Diego river flood control channel in Mission Valley, near Murphy Canyon Road, attempting to rescue their dog. The heavy rain storm contributed to abnormally high and swift current in the channel.

Flood in SAN DIEGO, CALIFORNIA
From 14-DEC-21 21:00:00 to 15-DEC-21 16:00:00 (PST-8)
Location: LAKE SAN MARCOS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain at St. Mark golf club reported on twitter. 1.34 inches of rainfall measured with pictures of flooded golf course and parking lots.

Flood in SAN DIEGO, CALIFORNIA
From 14-DEC-21 15:00:00 to 14-DEC-21 19:00:00 (PST-8)
Location: CARLSBAD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reports one lane of State Highway 78 at El Camino Real flooded.

Flash Flood in RIVERSIDE, CALIFORNIA
From 14-DEC-21 14:00:00 to 15-DEC-21 00:00:00 (PST-8)
Location: CALIMESA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway 38 closed at Bryant street in Yucaipa to Lake Williams east of Big Bear due to rock and debris flows. Heavy rain occurred past few hours in the afternoon.

Flash Flood in ORANGE, CALIFORNIA
From 14-DEC-21 15:00:00 to 15-DEC-21 00:00:00 (PST-8)
Location: SILVERADO
Flood cause: Heavy Rain / Burn Area
Property damage: 800.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Reported 6 debris flows in Bond Fire scar and 4 in Silverado Canyon. Santiago Creek Road blockage from high water flows and mud. Jackson Creek Road flooded with mud and debris. Rainfall rates of up to 1.2 inches reported at Irvine Lake and Santiago Canyon site.

Flood in ORANGE, CALIFORNIA
From 14-DEC-21 11:00:00 to 14-DEC-21 19:00:00 (PST-8)
Location: LAGUNA HILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Reports of flooding on both highway on ramps of State Routes 133 and 73 off ramp. Rain rates of 0.40 to 0.50 inches and hour have fallen over the area with near an inch over the past 6 hours.

Heavy Rain in ORANGE, CALIFORNIA
From 14-DEC-21 09:00:00 to 14-DEC-21 21:00:00 (PST-8)
Location: LAGUNA HILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reports heavy rainfall in last two hours in Aliso Viejo area averaging about 0.6 per hour. In the last 30 minutes, heavier rainfall was reported and estimated to be closer to an inch per hour. Total interim rainfaill total is now 2 1/8 inch since start of storm.

Flood in ORANGE, CALIFORNIA
From 14-DEC-21 08:00:00 to 14-DEC-21 18:00:00 (PST-8)
Location: SEAL BEACH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reports one half inch pf rain since 6:00 a.m. Flooding was noted, which closed the Pacific Coast Highway from Warner to Goldenwest. Estimated wind gusts near 30 mph.

Strong Wind in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 14-DEC-21 13:00:00 to 14-DEC-21 18:00:00 (PST-8)
Magnitude: 35.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Public reports large tree downed in Del Mar, uprooted near sidewalk. Wind reports in the area were near 40 MPH. Coastal San Diego County reported widespread peak wind gusts 35 to 45 MPH.

Strong Wind in SAN DIEGO COUNTY VALLEYS, CALIFORNIA
From 14-DEC-21 13:00:00 to 14-DEC-21 18:00:00 (PST-8)
Magnitude: 26.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree fell in roadway on San Pablo Drive near Lake San Marcos. Wind gusts of 26 to 33 mph occurred in the area.

Strong Wind in ORANGE COUNTY INLAND, CALIFORNIA
From 14-DEC-21 11:00:00 to 14-DEC-21 18:00:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Report from mPING: 1-inch tree limbs broken; shingles blown off. Wind gusts 40 to 45 mph in this area.

High Wind in SANTA ANA MOUNTAINS AND FOOTHILLS, CALIFORNIA
From 14-DEC-21 07:00:00 to 15-DEC-21 12:00:00 (PST-8)
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Widespread wind gusts over 50 MPH occurred. Fremont Canyon RAWS reported a max wind gust of 66 MPH and Case Springs RAWS reported a max wind gust of 72 MPH.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 14-DEC-21 10:00:00 to 14-DEC-21 18:00:00 (PST-8)
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread wind gusts over 50 MPH reported. HPWREN station Boucher Hill on Palomar Mountain reports maximum wind gust of 77 MPH.