A strong winter storm brought moderate to heavy rain with with flooding of roadways,  streams and creeks, with mudslides also reported. There was continued river flooding along the already elevated Sacramento, San Joaquin, Cosumnes, Mokelumne, and Tuolumne rivers. The storm brought dangerous mountain travel conditions with snow levels around down to 2000 feet, locally 1000 feet in Shasta County. Storm totals reached 1 to 3 feet of above 5000 feet. Winds gusted up to 35-50 mph in the Central Valley. In the mountains there were gusts up to 50 to 70 mph, which coupled with heavy snow, brought whiteout conditions. The were numerous road closures, including Interstate 80, Interstate 5 north of Fawndale, as well as State Routes 88, 89 and 299. Widespread trees down across the area blocked roads and caused power outages. There were thunderstorms on the 28th with a funnel cloud reported visible from the tower at Redding Airport.  There was a fatality reported when man was trapped by a collapsed snow bank next to his home.

Heavy Snow in WEST SLOPE NORTHERN SIERRA NEVADA, CALIFORNIA
From 27-MAR-23 22:00:00 to 29-MAR-23 19:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ski resorts reported storm total snow amounts of 23 inches at Kirkwood, 19 inches at Sugar Bowl, and 17 inches at Sierra at Tahoe. Caltrans District 3 reported storm total snow amounts of 23.5 inches at Kingvale, 21 inches at Soda Springs, and 18 inches at Eagle Lakes. The National Operational Hydrological Remote Sensing Center's gridded snowfall analysis estimated 6 to 30 inches over the west slope northern Sierra Nevada over 72 hours. 1 death was reported by broadcast media in Alta, CA where a man died from a collapsed snow bank, trapping him next to a generator and exposing him to carbon monoxide. Interstate 80 was closed intermittently on 3/28 due to winter weather conditions and multiple spinouts.

Heavy Snow in SHASTA LAKE/NORTH SHASTA COUNTY, CALIFORNIA
From 27-MAR-23 17:00:00 to 29-MAR-23 10:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The National Operational Hydrological Remote Sensing Center's gridded snowfall analysis estimated 6 to 24 inches over Shasta Lake and northern Shasta County over 72 hours. A trained spotter at Sims at an elevation of 2500 ft reported 14 inches in 24 hours. Caltrans reported the closure of Interstate 5 northbound at Fawndale for about 10 hours due to winter weather conditions.

Heavy Snow in MT SHASTA/WESTERN PLUMAS COUNTY, CALIFORNIA
From 27-MAR-23 22:00:00 to 29-MAR-23 19:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRaHS reported storm total amounts of 36 inches in Chester at 4526 ft, 38 inches at Meadow Valley at an elevation of 4380 ft, and 28 inches at Shingletown at an elevation of 3630 ft. The National Operational Hydrological Remote Sensing Center's gridded snowfall analysis estimated 12 to 36 inches over the Lassen Park and western Plumas County area over 72 hours. Lassen National Park reported 22 inches of snow.

Flood in SACRAMENTO, CALIFORNIA
From 28-MAR-23 10:33:00 to 28-MAR-23 18:33:00 (PST-8)
Location: SACRAMENTO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported roadway flooding halfway into the slow lane on SR 99 near highway 50 eastbound junction due to heavy rain.

Flood in SACRAMENTO, CALIFORNIA
From 28-MAR-23 12:46:00 to 28-MAR-23 20:46:00 (PST-8)
Location: SACRAMENTO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported roadway flooding of lanes 3 and 4 on northbound I-5 just south of Highway 50 junction.

Flood in SACRAMENTO, CALIFORNIA
From 28-MAR-23 20:45:00 to 29-MAR-23 20:45:00 (PST-8)
Location: BRIDGE HOUSE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported roadway flooding on Scott Road and Latrobe Road by Indian Creek.

Flood in SOLANO, CALIFORNIA
From 29-MAR-23 10:38:00 to 29-MAR-23 20:38:00 (PST-8)
Location: CORDELIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding near I-680 and Gold Hill Road offramp south of Cordelia is effecting southbound traffic on I-680.

Flood in STANISLAUS, CALIFORNIA
From 29-MAR-23 15:15:00 to 30-MAR-23 06:15:00 (PST-8)
Location: WEST MODESTO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mudslide on SR 99 North and 6th onramp. Onramp closed.

Funnel Cloud in SHASTA, CALIFORNIA
From 28-MAR-23 14:12:00 to 28-MAR-23 14:21:00 (PST-8)
Location: REDDING MUNI ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Redding Municipal Airport ASOS reported a brief funnel cloud.

Heavy Snow in BURNEY BASIN/EASTERN SHASTA COUNTY, CALIFORNIA
From 27-MAR-23 22:00:00 to 29-MAR-23 19:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The National Operational Hydrological Remote Sensing Center's gridded snowfall analysis estimated 4 to 18 inches over the Burney Basin and Eastern Shasta County over 72 hours.

Heavy Snow in MOUNTAINS SOUTHWESTERN SHASTA COUNTY TO WESTERN COLUSA COUNTY, CALIFORNIA
From 27-MAR-23 17:00:00 to 29-MAR-23 10:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The National Operational Hydrological Remote Sensing Center's gridded snowfall analysis estimated 6 to 24 inches over the mountains of southwestern Shasta County to western Colusa County over 72 hours.

Heavy Snow in NORTHEAST FOOTHILLS/SACRAMENTO VALLEY, CALIFORNIA
From 28-MAR-23 07:00:00 to 28-MAR-23 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Reports on social media showed an estimated 2 inches of snow on the ground in Grass Valley with more snow falling. The National Operational Hydrological Remote Sensing Center's gridded snowfall analysis estimated 1 to 8 inches of storm total snow over portions of the the northeast foothills. CoCoRaHS reported 3.1 inches of snow near Nevada City at an elevation of 2390 ft, and 7 inches near Grass Valley at an elevation of 2782 ft.

Heavy Snow in MOTHERLODE/CAMPTONVILLE TO GROVELAND, CALIFORNIA
From 28-MAR-23 10:00:00 to 29-MAR-23 05:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The National Operational Hydrological Remote Sensing Center's gridded snowfall analysis estimated 1 to 4 inches over portions of the Motherlode.