A strong and very wet atmospheric storm brought extended periods of moderate to heavy rain and periods of strong winds to much of the region, along with heavy high-elevation snow. Precipitation totals were around 1-3 inches for the Central Valley, 3-6 inches in the foothills, and 5-8 inches of liquid equivalent in the mountains. The rain brought widespread flooding to the region. This included significant river flooding on the Cosumnes River around Wilton due to multiple levee breaks, resulting in the area being evacuated and area highways and roads being closed, including SR-99. River flooding was also reported along the Mokelumne River near Benson's Ferry and Mormon Slough at Bellota. Flooding of streams, in low areas and from clogged storm drains also closed many other roads across Northern California, with several small communities being evacuated. Heavy snow also disrupted mountain travel, with multiple spinouts causing I-80 to be shut down for 18 hours. Highway 50 was closed in El Dorado County due to a combination of flooding and snow. High winds gusting 50-65 mph in the Central Valley caused large numbers of trees to fall, bringing widespread power failures across the area, with hundreds of thousands of customers impacted. Many local roads were closed to downed trees blocking them. Trees were also reported to have fallen on homes and automobiles. The storm with flooding continued into January, with several fatalities reported due to drowning and wind-downed trees.

Flood in EL DORADO, CALIFORNIA
From 31-DEC-22 09:47:00 to 31-DEC-22 15:47:00 (PST-8)
Location: MOTOR CITY
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

CHP Placerville reported a mudslide through a house.

Flood in EL DORADO, CALIFORNIA
From 31-DEC-22 08:42:00 to 31-DEC-22 14:42:00 (PST-8)
Location: MOSQUITO CAMP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP Placerville reported a mudslide just north of the Mosquito Bridge on Mosquito Rd. Foresthill reported a rainfall total of 2.67 inches over 24 hours.

Flood in EL DORADO, CALIFORNIA
From 31-DEC-22 09:16:00 to 31-DEC-22 21:16:00 (PST-8)
Location: RIVERTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Caltrans and the CHP reported a roadway closure of US-50 due to flooding from Ice House Road to Meyers Road.

Flood in EL DORADO, CALIFORNIA
From 31-DEC-22 09:30:00 to 31-DEC-22 15:30:00 (PST-8)
Location: SOMERSET
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported the Cosumnes River Bridge at Bucks Bar Rd. was flooding.

Flood in EL DORADO, CALIFORNIA
From 31-DEC-22 09:40:00 to 31-DEC-22 15:40:00 (PST-8)
Location: POLLOCK PINES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

US 50 was closed from Sly Park Rd. to Meyers due to flooding.

Flood in SACRAMENTO, CALIFORNIA
From 31-DEC-22 10:53:00 to 31-DEC-22 19:53:00 (PST-8)
Location: ELVAS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple reports of roadways closed due to roadway flooding and vehicles stalling in water in Sacramento County since the morning.

Flood in AMADOR, CALIFORNIA
From 31-DEC-22 14:15:00 to 31-DEC-22 20:15:00 (PST-8)
Location: JACKSON
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

OES said the roadway flooded with cars getting stuck & 15 people needed help.

Flood in SAN JOAQUIN, CALIFORNIA
From 31-DEC-22 14:45:00 to 31-DEC-22 20:45:00 (PST-8)
Location: TRACY MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Corral Hollow Rd closed between Highway 580 and the Alameda County line due to mudslides, multiple reports of road closures due to roadway flooding across San Joaquin County.

High Wind in NORTHERN SACRAMENTO VALLEY, CALIFORNIA
From 27-DEC-22 01:35:00 to 27-DEC-22 03:00:00 (PST-8)
Magnitude: 52.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: ASOS

The Redding Municipal Airport observed a gust of 60 mph at 0153 am. Sustained winds of 40 mph and greater began at 0135 am and ended at 0300 am. A tree fell across road on Highway 89 mile at marker 11 and 2 vehicles hit the tree. No injuries reported.

Flood in SACRAMENTO, CALIFORNIA
From 31-DEC-22 15:30:00 to 31-DEC-22 21:30:00 (PST-8)
Location: DILLARD
Flood cause: Dam / Levee Break
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding occurring in Wilton due to Cosumnes River Overtopping the levee. Evacuation Warning was issued by Sacramento County OES for residents of Wilton.

Flood in EL DORADO, CALIFORNIA
From 31-DEC-22 13:45:00 to 31-DEC-22 23:00:00 (PST-8)
Location: SHINGLE SPGS ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

El Dorado County Sheriff issued an evacuation order for a neighborhood with 50 homes in Cameron Park due to flooding of Deer Creek.

Flood in STANISLAUS, CALIFORNIA
From 31-DEC-22 15:50:00 to 31-DEC-22 23:59:00 (PST-8)
Location: EUGENE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Milton Road was closed for flooding. Vehicles were reported driving around the barricade.

Flood in EL DORADO, CALIFORNIA
From 31-DEC-22 11:00:00 to 31-DEC-22 17:00:00 (PST-8)
Location: SHINGLE SPGS ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Neighborhoods in Cameron Park were flooded, with videos showing flood waters rushing down the road and approaching homes. There were also multiple reports of roadway closures in western El Dorado County due to flooding.

High Wind in MOTHERLODE/CAMPTONVILLE TO GROVELAND, CALIFORNIA
From 27-DEC-22 00:30:00 to 27-DEC-22 10:00:00 (PST-8)
Magnitude: 41.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The CHP reported a tree down on SR49 and SR 193 in Placerville. The Placerville Airport reported gusts up to 47 mph.

Flood in CALAVERAS, CALIFORNIA
From 31-DEC-22 14:00:00 to 31-DEC-22 20:00:00 (PST-8)
Location: CAMP SECO
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Fifteen people had to be rescued from the Castle Oaks mobile home park. Multiple homes and townhouses flooded in La Contenta.

Flood in STANISLAUS, CALIFORNIA
From 31-DEC-22 15:40:00 to 31-DEC-22 23:59:00 (PST-8)
Location: WEST MODESTO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported SR99 N and Kansas Ave onramp in Modesto flooding, with lanes 1 and 3 flooded. SR99 was closed in both directions through around midnight.

Flood in EL DORADO, CALIFORNIA
From 31-DEC-22 06:44:00 to 31-DEC-22 23:59:00 (PST-8)
Location: SHINGLE SPGS ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Deer Creek overflowing banks and flooding road with water and debris.

Flood in EL DORADO, CALIFORNIA
From 31-DEC-22 06:55:00 to 31-DEC-22 12:55:00 (PST-8)
Location: CHILI BAR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported the northbound lane of Rock Creek Rd near SR 193 closed due to rocks and mud with 6 yards of dirt in the roadway.

Strong Wind in SOUTHERN SACRAMENTO VALLEY, CALIFORNIA
From 27-DEC-22 04:15:00 to 27-DEC-22 11:35:00 (PST-8)
Magnitude: 38.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: ASOS

A large tree was reported down at McCourtney Rd. in Lincoln at 11:22 PST. Lincoln Airport measured a gust of 44 mph at 5:35 PST.

Strong Wind in MOTHERLODE/CAMPTONVILLE TO GROVELAND, CALIFORNIA
From 27-DEC-22 00:30:00 to 27-DEC-22 10:00:00 (PST-8)
Magnitude: 41.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The CHP reported a tree down on SR49 and SR 193 in Placerville. The Placerville Airport reported gusts up to 47 mph.

Strong Wind in SOUTHERN SACRAMENTO VALLEY, CALIFORNIA
From 27-DEC-22 09:53:00 to 27-DEC-22 11:22:00 (PST-8)
Magnitude: 35.00 MG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: ASOS

Downed phone lines were reported by Elk Grove Police at Bradshaw Rd. and Grant Line Rd at 11:22 PST. Sacramento Executive measured a gust of 40 mph at 9:48 PST.

Flood in PLACER, CALIFORNIA
From 31-DEC-22 09:47:00 to 31-DEC-22 09:47:00 (PST-8)
Location: MC KEON
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a mudslide through a house.

Flash Flood in SACRAMENTO, CALIFORNIA
From 31-DEC-22 23:30:00 to 31-DEC-22 23:59:00 (PST-8)
Location: GLANNVALE
Flood cause: Dam / Levee Break
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Sacramento County OES confirmed the levee along the Cosumnes River breached in at least two locations overnight, causing flash flooding in the surrounding areas. Highway 99 between Dillard Rd and Grantline Rd was flooded with numerous vehicles stuck in flood waters, requiring water rescues. Highway 99 was closed around midnight due to flooding. Flooding continued into January 2023.

High Wind in SOUTHERN SACRAMENTO VALLEY, CALIFORNIA
From 31-DEC-22 18:50:00 to 31-DEC-22 21:25:00 (PST-8)
Magnitude: 56.00 MG
Crop damage: 0.00K
Reported by: Law Enforcement

There were many reports of trees uprooted & large branches down. Over 145,000 customers were without power in the Sacramento area due to falling trees knocking down several power lines in high winds. Power was still out for 40,000+ customers as of 9:30am on 1/1/2023. Sacramento International Airport reported sustained winds above 40 mph with wind gusts above 45 to 50 mph from 6:50 pm through 9 pm with a peak gust of 61 mph at 736 pm. Sacramento Executive Airport reported wind gusts above 45 mph from 6:50 pm through 9:25 pm with a peak gust of 64 mph at 814 pm. Sustained winds exceeded 40 mph from 7:45 pm to 9 pm. McClellan Airfield Airport reported wind gusts above 45 mph from 7:15 pm through 9:15 pm with a peak gust of 60 mph at 815 pm. Sustained winds exceeded 40 mph from 7:35 pm to 8:55 pm.

Flood in AMADOR, CALIFORNIA
From 31-DEC-22 05:40:00 to 31-DEC-22 11:40:00 (PST-8)
Location: PLYMOUTH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Caltrans District 10 reported on Twitter that SR-49 was closed in Plymouth at Shenandoah Rd. due to flooding. The closure extended into El Dorado County. On the California Highway Patrol Incident log it was reported at 3:30 am that water was 2 ft deep and that at 5:40am the road was closed.

Flood in AMADOR, CALIFORNIA
From 27-DEC-22 08:44:00 to 27-DEC-22 12:00:00 (PST-8)
Location: PIONEER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

California Highway Patrol reported roadway flooding near Pioneer School this morning, at SR88 and Defender Grade Road. Some rainfall totals over 24 hours were 3.44 inches at Mount Zion, 3.10 inches at Fiddletown 3.5 SE and 2.88 inches at Pioneer.

Strong Wind in NORTHERN SAN JOAQUIN VALLEY, CALIFORNIA
From 31-DEC-22 21:50:00 to 31-DEC-22 22:25:00 (PST-8)
Magnitude: 47.00 MG
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Law Enforcement

There were reports of a large number of large trees uprooted and tree limbs down due to high winds from 6:30 pm to 11 pm in San Joaquin, and Stanislaus Counties on December 31, 2022. Trees fell onto powerlines, causing significant number of power outages reported by PG&E. Multiple power outages continued into midday on January 1, 2022. Stockton Airport reported wind gusts above 45 mph from 9:50 pm through 10:25 pm with a peak gust of 54 mph at 10:20 pm.

Flood in SACRAMENTO, CALIFORNIA
From 31-DEC-22 09:50:00 to 31-DEC-22 15:50:00 (PST-8)
Location: ELK GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Cosumnes Fire Department reported a water rescue of persons stuck on a temporary island in the middle of Laguna Creek in East Elk Grove.

Flood in EL DORADO, CALIFORNIA
From 31-DEC-22 08:43:00 to 31-DEC-22 20:43:00 (PST-8)
Location: LOTUS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported the roadway was blocked due to flooding at Lotus Rd. and Granite Creek Rd.

High Wind in NORTHERN SACRAMENTO VALLEY, CALIFORNIA
From 27-DEC-22 01:35:00 to 27-DEC-22 03:00:00 (PST-8)
Magnitude: 52.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: ASOS

The Redding Municipal Airport observed a gust of 60 mph at 0153 am. Sustained winds of 40 mph and greater began at 0135 am and ended at 0300 am. A tree down in Redding at Deschutes Rd and Balls Ferry Rd caused a collision, completely blocking the road.

Flood in SAN JOAQUIN, CALIFORNIA
From 31-DEC-22 08:25:00 to 31-DEC-22 14:25:00 (PST-8)
Location: MORADA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding at Hammer Ln underpass at the railroad tracks just east of Lorraine Ave.

Flood in CALAVERAS, CALIFORNIA
From 31-DEC-22 08:47:00 to 31-DEC-22 12:47:00 (PST-8)
Location: VALLEY SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported the entire roadway flooded along SR 26 near Saint Andrews Rd.

Flood in SACRAMENTO, CALIFORNIA
From 31-DEC-22 00:56:00 to 31-DEC-22 06:56:00 (PST-8)
Location: BRIDGE HOUSE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Crews were dispatched for a washed out vehicle on Scott Rd at Deer Creek. Several teens were rescued from tree limbs after their vehicle was immobilized. No injuries reported. Some rainfall totals over 24 hours were 1.94 inches at Orangevale, 1.33 inches at Elk Grove, 1.50 inches at Folsom and 1.21 inches at Wilton.

Flood in SACRAMENTO, CALIFORNIA
From 31-DEC-22 06:19:00 to 31-DEC-22 12:19:00 (PST-8)
Location: WHITE ROCK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

East Bidwell St / US 50 East offramp was flooded with a river of water flowing over the roadway offramp. Some rainfall totals over 24 hours were 1.94 inches at Orangevale, 1.33 inches at Elk Grove, 1.50 inches at Folsom and 1.21 inches at Wilton.

Winter Storm in WEST SLOPE NORTHERN SIERRA NEVADA, CALIFORNIA
From 27-DEC-22 10:00:00 to 28-DEC-22 10:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The atmospheric river brought some heavy snow to high elevations, generally above 7,000 feet, with lighter accumulations down to 6,000 feet. Dodge Ridge Ski Resort measured 17 inches of new snow, Kirkwood 20 inches, Sierra at Tahoe 16 inches, Sugar Bowl 15 inches. Snow with some gusty winds brought lowered visibility as well as delays and chain controls at the Sierra passes, including Donner Pass on I-80 and Echo Summit on US Highway 50.

Flood in SACRAMENTO, CALIFORNIA
From 27-DEC-22 10:37:00 to 27-DEC-22 16:37:00 (PST-8)
Location: SACRAMENTO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported significant flooding in the #1 lane of the ramp off I-5 due to a clogged storm drain. Some rainfall totals over 24 hours were 1.26 inches at Mather, 1.46 inches at Fair Oaks.

Flood in EL DORADO, CALIFORNIA
From 31-DEC-22 09:03:00 to 31-DEC-22 15:03:00 (PST-8)
Location: GOLD HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported vehicles unable to pass due to flooded roads at Cold Springs Rd and Richard Ave.

Flood in PLACER, CALIFORNIA
From 31-DEC-22 09:05:00 to 31-DEC-22 15:05:00 (PST-8)
Location: LINCOLN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported the roadway was blocked due to flooding at Athens Rd and Industrial Rd.