A cold trough from the Gulf of Alaska dropped into Northern California which brought a high impact winter storm to the region. Widespread precipitation, low snow levels of 500 to 2500 feet, and strong and damaging wind resulted. Impacts ranged from fallen trees, downed power and phone lines, trecherous driving conditions including chain controls and highway closures due to wind and/or snow, multiple accidents and spin outs due to snow, widespread power outages, damaged property due to wind, and injuries. Sacramento County was investigating several homeless related deaths due to cold weather; however, no reports have come back linking the two together.

Winter Storm in SHASTA LAKE/NORTH SHASTA COUNTY, CALIFORNIA
From 26-JAN-21 16:00:00 to 27-JAN-21 09:42:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotters across Shasta County in zone 13 reported 32 inches of snow in Sims and 12 inches of snow 1 West of Central Valley.

Winter Storm in SHASTA LAKE/NORTH SHASTA COUNTY, CALIFORNIA
From 26-JAN-21 16:00:00 to 27-JAN-21 09:42:00 (PST-8)
Reported by: Park/Forest Service

Whiskeytown National Recreational Area reported 18 inches of snow, multiple reports of downed trees and powerlines due to snow, and that California Highway Patrol shut down travel along 299 in Old Shasta. At time of report it was still snowing.

Winter Storm in NORTHERN SACRAMENTO VALLEY, CALIFORNIA
From 26-JAN-21 16:00:00 to 27-JAN-21 09:42:00 (PST-8)
Reported by: Public

The public reported between 5 to 10 inches of snow across the City of Redding. 1 inch of snow was reported near Millville and 2 inches was reported in Anderson.

Winter Storm in NORTHERN SACRAMENTO VALLEY, CALIFORNIA
From 26-JAN-21 16:00:00 to 27-JAN-21 09:42:00 (PST-8)
Reported by: Fire Department/Rescue

The fire department reported 1.5 inches of snow at Redding Airport. Elevation is 505 feet.

Winter Storm in NORTHERN SACRAMENTO VALLEY, CALIFORNIA
From 26-JAN-21 16:00:00 to 27-JAN-21 09:42:00 (PST-8)
Reported by: Department of Highways

Multiple spun out vehicles, including jack-knifed, stalled, or disabled big rigs, have been reported across Shasta County, including but not limited to I-5 and Hwy 299. Additionally, multiple highways closed due to heavy snow.

Winter Storm in MOUNTAINS SOUTHWESTERN SHASTA COUNTY TO WESTERN COLUSA COUNTY, CALIFORNIA
From 26-JAN-21 16:00:00 to 28-JAN-21 16:00:00 (PST-8)
Reported by: CoCoRaHS

A CoCoRaHS observer at 3.4 NW of Igo reported 19 inches of snow accumulation.

Winter Storm in MOUNTAINS SOUTHWESTERN SHASTA COUNTY TO WESTERN COLUSA COUNTY, CALIFORNIA
From 26-JAN-21 16:00:00 to 28-JAN-21 16:00:00 (PST-8)
Reported by: Fire Department/Rescue

Snow closed FH7 from County Road 306 (near Elk Creek) to the Mendocino Pass, which is within the August fire burn area. Some trees and power lines down, but no major damage was observed.

Winter Storm in MOTHERLODE/CAMPTONVILLE TO GROVELAND, CALIFORNIA
From 26-JAN-21 16:00:00 to 28-JAN-21 02:00:00 (PST-8)
Reported by: CoCoRaHS

CoCoRaHS observers reported 2 inches of snow at 2 SW of Bald Mountain Summit and  1 NNE of Grass Valley, which are at elevations of 2350 and 2780 feet respectively.

Winter Storm in MOTHERLODE/CAMPTONVILLE TO GROVELAND, CALIFORNIA
From 26-JAN-21 16:00:00 to 28-JAN-21 02:00:00 (PST-8)
Reported by: Trained Spotter

A spotter reported 4 inches of snow 2 SSE of Nevada City.

Winter Storm in NORTHEAST FOOTHILLS/SACRAMENTO VALLEY, CALIFORNIA
From 26-JAN-21 16:00:00 to 28-JAN-21 02:00:00 (PST-8)
Reported by: CoCoRaHS

Shingletown CoCoRaHS observers reported between 13 and 17 inches of storm total snow accumulation.

Winter Storm in NORTHEAST FOOTHILLS/SACRAMENTO VALLEY, CALIFORNIA
From 26-JAN-21 16:00:00 to 28-JAN-21 02:00:00 (PST-8)
Reported by: Public

A member of the public reported 13 inches of snow accumulation in the Magalia DeSabla area.

Winter Storm in NORTHEAST FOOTHILLS/SACRAMENTO VALLEY, CALIFORNIA
From 26-JAN-21 16:00:00 to 28-JAN-21 02:00:00 (PST-8)
Reported by: County Official

Paradise Unified School District closed all of their schools, including distance and hybrid learning, on January 27 due to snow and poor weather conditions.

Winter Storm in MT SHASTA/WESTERN PLUMAS COUNTY, CALIFORNIA
From 26-JAN-21 16:00:00 to 28-JAN-21 22:17:00 (PST-8)
Reported by: Trained Spotter

Quincy reported 12 inches of snow.

Winter Storm in MT SHASTA/WESTERN PLUMAS COUNTY, CALIFORNIA
From 26-JAN-21 16:00:00 to 28-JAN-21 22:17:00 (PST-8)
Reported by: COOP Observer

Chester reported 24 inches of storm total snow, Mineral reported 30 inches, and Manzanita reported 19 inches.

Winter Storm in WEST SLOPE NORTHERN SIERRA NEVADA, CALIFORNIA
From 27-JAN-21 09:42:00 to 29-JAN-21 07:00:00 (PST-8)
Reported by: Public

Sierra Nevada Ski Resorts reported between 4 and 8.5 feet of snow accumulation for the entire event, including the Blizzard Warning. Kirkwood and Dodge Ridge reported roughly 8.5 feet, Sierra-at-Tahoe roughly 7 feet, Sugar Bowl 6.5 feet, Sugar Bowl 6.25 feet, Tahoe Donner roughly 6 feet, and Bear Valley got about 5.25 feet snow.

Winter Storm in WEST SLOPE NORTHERN SIERRA NEVADA, CALIFORNIA
From 27-JAN-21 09:42:00 to 29-JAN-21 07:00:00 (PST-8)
Reported by: Department of Highways

Caltrans reported 4.25 feet of new snow at their Kingvale location. Portions of I-80 also closed throughout the event due to spinouts and/or accidents.

Blizzard in BURNEY BASIN/EASTERN SHASTA COUNTY, CALIFORNIA
From 26-JAN-21 16:00:00 to 27-JAN-21 09:42:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Blue Canyon reported blizzard conditions with visibility falling to a quarter mile and peak wind gusts making it up 44 mph.

High Wind in NORTHEAST FOOTHILLS/SACRAMENTO VALLEY, CALIFORNIA
From 26-JAN-21 20:00:00 to 27-JAN-21 09:00:00 (PST-8)
Magnitude: 58.00 MG
Reported by: Broadcast Media

High winds resulted in fallen trees throughout the Sacramento Valley. Media reported an incident that resulted in 2 injuries just east of Chico, CA along Centerville Road in Butte Creek Canyon. 1 individual was taken the the hospital; the other injury was minor. Peak wind gusts, reported by a myriad of weather stations, for the zone ranged from 30 to 67 mph.

Strong Wind in NORTHERN SACRAMENTO VALLEY, CALIFORNIA
From 26-JAN-21 20:00:00 to 27-JAN-21 09:00:00 (PST-8)
Magnitude: 48.00 MG
Property damage: 50.00K
Reported by: Fire Department/Rescue

Power outage for full Zogg fire area due to damaged trees down on powerlines. Peak wind gusts, reported by a myriad of weather stations, for the zone ranged from 30 to 51 mph. Damage costs are estimated.

High Wind in CARQUINEZ STRAIT AND DELTA, CALIFORNIA
From 26-JAN-21 20:00:00 to 27-JAN-21 09:00:00 (PST-8)
Magnitude: 56.00 MG
Property damage: 200.00K
Reported by: Newspaper

High winds caused a significant amount of trees and powerlines to fall across the area causing widespread power outages, closed roads, and dangerous driving conditions. It was noted that several homes were damaged in Solano County. Peak wind gusts, reported by a myriad of weather stations, for the zone ranged from 35 to 65 mph. Damage costs are estimated.

High Wind in CARQUINEZ STRAIT AND DELTA, CALIFORNIA
From 26-JAN-21 20:00:00 to 27-JAN-21 09:00:00 (PST-8)
Magnitude: 56.00 MG
Property damage: 50.00K
Reported by: Fire Department/Rescue

A fire partner reported that many trees were done across the city of Vacaville. Damage costs are estimated.

High Wind in NORTHERN SAN JOAQUIN VALLEY, CALIFORNIA
From 26-JAN-21 20:00:00 to 27-JAN-21 09:00:00 (PST-8)
Magnitude: 50.00 MG
Property damage: 200.00K
Reported by: Newspaper

The media reported that winds caused downed trees and power lines, which led to damaged property and hazardous driving conditions across the Stanislaus and San Joaquin counties. Peak wind gusts, reported by a myriad of weather stations, for the zone ranged from 35 to 58 mph. Damage costs are estimated.

Heavy Rain in STANISLAUS, CALIFORNIA
From 27-JAN-21 01:00:00 to 27-JAN-21 10:00:00 (PST-8)
Location: SALIDA
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Newspaper

The media reported that street flooding and rockslides occurred due to heavy rain. They also noted that Stanislaus Sheriff Department said a few vehicles were damaged as well. Damage costs are estimated. Location is not approximate as it was provided as a general statement.

High Wind in NORTHEAST FOOTHILLS/SACRAMENTO VALLEY, CALIFORNIA
From 26-JAN-21 20:00:00 to 27-JAN-21 09:00:00 (PST-8)
Magnitude: 58.00 MG
Property damage: 100.00K
Reported by: County Official

Public works of Butte County reported that many trees and limbs came down in the valley and foothill communities, including Camp Burn Scar.  There is no count on the trees, but a lot of calls came from south county foothills, Forbestown area.

High Wind in NORTHEAST FOOTHILLS/SACRAMENTO VALLEY, CALIFORNIA
From 26-JAN-21 20:00:00 to 27-JAN-21 09:00:00 (PST-8)
Magnitude: 50.00 MG
Property damage: 200.00K
Reported by: Newspaper

Local news site reported that the foothills, specifically in the Sierra, Nevada, Placer, and El Dorado areas, reported widespread power outages due to wind. Additionally, many local highways were closed for snow and wind debris removal. Peak wind gusts, reported by a myriad of weather stations, for the zone ranged from 30 to 58 mph. Damage costs are estimated.

Winter Storm in BURNEY BASIN/EASTERN SHASTA COUNTY, CALIFORNIA
From 26-JAN-21 16:00:00 to 28-JAN-21 22:17:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported 11 inches of snow in Burney, CA via social media.

Winter Storm in SHASTA LAKE/NORTH SHASTA COUNTY, CALIFORNIA
From 26-JAN-21 16:00:00 to 27-JAN-21 09:42:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Members of the public reported 8 inches of snow at Jones Valley, south of Lake Shasta and 18 inches of snow at Whiskeytown Lake.