A large upper-level trough slowly evolved south and eastward over the northeast Pacific Ocean during early to middle portions of March. Multiple waves of showers spread inland across northwest California as a result. Accumulating snowfall occurred across the mountains with the passing showers, while isolated instances of small hail were observed at sea level along the coast.

Winter Weather in SOUTHERN LAKE COUNTY, CALIFORNIA
From 08-MAR-21 13:00:00 to 09-MAR-21 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter report of 0.1 inch of snow at an elevation of 2100 feet.

Winter Weather in SOUTHERN LAKE COUNTY, CALIFORNIA
From 08-MAR-21 13:00:00 to 08-MAR-21 18:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter report of 0.5 inch of snow.

Winter Weather in SOUTHERN LAKE COUNTY, CALIFORNIA
From 09-MAR-21 06:00:00 to 09-MAR-21 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter of 1.5 inches of snow in one hour at an elevation of 3200 feet.

Winter Weather in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 09-MAR-21 05:00:00 to 09-MAR-21 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

One inch of snow in two hours at an elevation of 2700 feet.

Winter Weather in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 08-MAR-21 13:00:00 to 09-MAR-21 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Measured snowfall of 3.2 inches at an elevation of 2675 feet.

Winter Weather in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 08-MAR-21 13:00:00 to 09-MAR-21 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall accumulation of approximately 4 inches at an elevation of 4220 feet.

Winter Weather in SOUTHERN TRINITY, CALIFORNIA
From 08-MAR-21 13:00:00 to 09-MAR-21 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall accumulation of 1.1 inches at an elevation of 2532 feet.

Winter Weather in SOUTHERN TRINITY, CALIFORNIA
From 08-MAR-21 13:00:00 to 09-MAR-21 07:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snow accumulation of 2 inches at an elevation of 2762 feet.

Winter Weather in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 09-MAR-21 03:00:00 to 09-MAR-21 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter report of 3.5 inches of snow at an elevation of 2700 feet.

Heavy Snow in NORTHWESTERN MENDOCINO INTERIOR, CALIFORNIA
From 08-MAR-21 16:00:00 to 09-MAR-21 08:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Six inches of snow at an elevation of 4000 feet.

Heavy Snow in NORTHWESTERN MENDOCINO INTERIOR, CALIFORNIA
From 08-MAR-21 21:00:00 to 09-MAR-21 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter report of 8 inches of snow at an elevation of 3000 feet.

Winter Weather in NORTHWESTERN MENDOCINO INTERIOR, CALIFORNIA
From 08-MAR-21 13:00:00 to 09-MAR-21 18:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter report of 0.5 inch of snow at an elevation of 1938 feet.

Winter Weather in NORTHERN TRINITY, CALIFORNIA
From 08-MAR-21 13:00:00 to 09-MAR-21 22:00:00 (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 2650 feet.

Winter Weather in NORTHWESTERN MENDOCINO INTERIOR, CALIFORNIA
From 09-MAR-21 18:00:00 to 10-MAR-21 09:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of 2 inches of snow at an elevation of 1800 feet.

Winter Weather in NORTHWESTERN MENDOCINO INTERIOR, CALIFORNIA
From 09-MAR-21 18:00:00 to 10-MAR-21 10:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of 1.5 inches of snow at an elevation of 1830 feet.