A cold upper-level trough typical of early March progressed east across northwest California. Light to moderate snow occurred across the Mountains with the trough, with snow levels occasionally falling as low as 1200 feet. Impacts were mainly confined to hazardous travel conditions along interior mountain highway routes.

Winter Weather in DEL NORTE INTERIOR, CALIFORNIA
From 05-MAR-21 18:00:00 to 06-MAR-21 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway webcam provided an estimated snowfall total between 3 to 5 inches at Collier Tunnel on Highway 199. Elevation of the report is 2115 feet.

Winter Weather in NORTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 05-MAR-21 18:00:00 to 06-MAR-21 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway webcam gave an estimated snowfall total from 2 to 4 inches at Berry Summit on Highway 299. Elevation of the report was 2871 feet.

Winter Weather in NORTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 05-MAR-21 16:00:00 to 06-MAR-21 00:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reports 4 inches of snow at an elevation of 3000 feet.

Heavy Snow in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 05-MAR-21 18:00:00 to 06-MAR-21 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured snowfall of 7.2 inches occurring at an elevation of 4000 feet.

Winter Weather in SOUTHERN TRINITY, CALIFORNIA
From 05-MAR-21 18:00:00 to 06-MAR-21 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured snowfall of 3.3 inches at an elevation of 3000 feet.

Winter Weather in SOUTHERN TRINITY, CALIFORNIA
From 05-MAR-21 20:00:00 to 06-MAR-21 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured snowfall of 2.5 inches at an elevation of 4000 feet.

Winter Weather in NORTHERN TRINITY, CALIFORNIA
From 05-MAR-21 20:00:00 to 06-MAR-21 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured snowfall of 0.5 inch at an elevation of 2500 feet.

Winter Weather in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 05-MAR-21 18:00:00 to 05-MAR-21 23:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of 3 inches of snow at an elevation of 2500 feet near Kneeland.

Winter Weather in NORTHERN TRINITY, CALIFORNIA
From 05-MAR-21 22:00:00 to 06-MAR-21 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter report of 0.75 inch of snow at an elevation of 1260 feet.

Heavy Snow in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 05-MAR-21 17:00:00 to 06-MAR-21 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of 7.2 inches of snow at an elevation of 4200 feet near Buck Mountain.

Winter Weather in SOUTHERN TRINITY, CALIFORNIA
From 05-MAR-21 19:00:00 to 06-MAR-21 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of 3 inches of snow near Ruth, CA at an elevation of 2800 feet.

Winter Weather in SOUTHERN TRINITY, CALIFORNIA
From 05-MAR-21 21:00:00 to 06-MAR-21 01:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter report of 4 inches of snow at an elevation of 3000 feet.