Shortwave trough brought another burst of cold air and lower snow levels. Snow levels fell below 1,000 feet in portions of the area. Some longer duration totals are included as a series of shortwave embedded in the long-wave trough moved across the area.

Winter Weather in NORTHWESTERN MENDOCINO INTERIOR, CALIFORNIA
From 27-DEC-21 00:00:00 to 27-DEC-21 09:00:00 (PST-8)
Reported by: Social Media

Report of around an inch fell overnight at an elevation of 2,063 feet. Duration was around 9-hours.

Winter Weather in NORTHERN TRINITY, CALIFORNIA
From 26-DEC-21 00:00:00 to 26-DEC-21 09:00:00 (PST-8)
Reported by: Trained Spotter

Spotter report of 3 inches of snow fell overnight (around a 9-hour duration) at an elevation of 1,257 feet.

Winter Weather in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 26-DEC-21 08:30:00 to 26-DEC-21 16:30:00 (PST-8)
Reported by: Trained Spotter

Spotter report of 5 inches of new snow that fell during an 8-hour duration at an elevation of 2,625 feet.

Winter Weather in SOUTHERN LAKE COUNTY, CALIFORNIA
From 26-DEC-21 02:00:00 to 26-DEC-21 11:00:00 (PST-8)
Reported by: Social Media

Report of 2 inches of snow fell during a 9-hour duration at an elevation of 2,300 feet.

Winter Weather in NORTHWESTERN MENDOCINO INTERIOR, CALIFORNIA
From 25-DEC-21 20:00:00 to 26-DEC-21 08:00:00 (PST-8)
Reported by: Social Media

Report of 2 inches that fell off and on during a 12-hour duration at an elevation of 2,084 feet.

Winter Weather in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 25-DEC-21 18:00:00 to 26-DEC-21 18:00:00 (PST-8)
Reported by: Social Media

Report of 6 inches of total snow fell during a 24-duration at an elevation of 2,700 feet.

Winter Weather in DEL NORTE INTERIOR, CALIFORNIA
From 25-DEC-21 22:00:00 to 26-DEC-21 08:00:00 (PST-8)
Reported by: Social Media

Report of 2 inches of snow fell during a 10-hour duration at an elevation of 380 feet.

Winter Weather in NORTHERN HUMBOLDT COAST, CALIFORNIA
From 25-DEC-21 22:00:00 to 26-DEC-21 06:00:00 (PST-8)
Reported by: Public

Report of 0.5 inches of snow fell overnight at an elevation of 790 feet.

Winter Weather in SOUTHERN LAKE COUNTY, CALIFORNIA
From 26-DEC-21 00:00:00 to 26-DEC-21 09:00:00 (PST-8)
Reported by: Public

Report of 2 inches of snow fell overnight at an unknown elevation.

Winter Weather in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 26-DEC-21 07:00:00 to 27-DEC-21 07:00:00 (PST-8)
Reported by: CoCoRaHS

A 24-hour report of 3 inches snow fell around Kneeland.

Winter Weather in SOUTHEASTERN MENDOCINO INTERIOR, CALIFORNIA
From 26-DEC-21 07:00:00 to 27-DEC-21 07:00:00 (PST-8)
Reported by: CoCoRaHS

A 24-hour total of 0.5 inch of snow fell.

Winter Weather in NORTHERN TRINITY, CALIFORNIA
From 26-DEC-21 07:00:00 to 27-DEC-21 07:00:00 (PST-8)
Reported by: CoCoRaHS

A 24-hour report of 1 inch of snow fell at an elevation 2,821 feet.

Winter Weather in SOUTHERN LAKE COUNTY, CALIFORNIA
From 26-DEC-21 18:30:00 to 27-DEC-21 09:15:00 (PST-8)
Reported by: Trained Spotter

Spotter report of 2 inches of new snow fell during at 14-hour duration at an elevation around 3,200 feet.

Winter Weather in DEL NORTE INTERIOR, CALIFORNIA
From 26-DEC-21 07:00:00 to 27-DEC-21 07:00:00 (PST-8)
Reported by: CoCoRaHS

A 24-hour report of 2 inches of snow fell at an elevation of 843 feet.

Heavy Snow in NORTHERN LAKE COUNTY, CALIFORNIA
From 26-DEC-21 07:00:00 to 27-DEC-21 07:00:00 (PST-8)
Reported by: CoCoRaHS

A 24-hour report of 12 inches of snow fell at an elevation of 2,849 feet.

Heavy Snow in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 27-DEC-21 00:00:00 to 27-DEC-21 08:00:00 (PST-8)
Reported by: Trained Spotter

Spotter report of 12 inches of new snow that fell during an 8-hour duration at an elevation of 2,700 feet.

Winter Weather in NORTHWESTERN MENDOCINO INTERIOR, CALIFORNIA
From 26-DEC-21 23:00:00 to 27-DEC-21 07:45:00 (PST-8)
Reported by: Public

Report of 4 inches of snow that fell during roughly a 9-hour duration at an elevation of 1,600 feet.

Winter Weather in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 26-DEC-21 07:00:00 to 27-DEC-21 07:00:00 (PST-8)
Reported by: CoCoRaHS

A 24-hour report of 4.9 inches of snow at an elevation of 4,220 feet.

Winter Weather in NORTHERN HUMBOLDT COAST, CALIFORNIA
From 25-DEC-21 23:00:00 to 26-DEC-21 04:00:00 (PST-8)
Reported by: Trained Spotter

Spotter report of 0.5 inch of snow fell during a 5-hour duration at an elevation of 840 feet.

Winter Weather in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 26-DEC-21 00:00:00 to 26-DEC-21 08:00:00 (PST-8)
Reported by: Trained Spotter

Spotter report of 6 inches of snow fell overnight at an elevation of 2,625 feet.

Winter Weather in SOUTHERN LAKE COUNTY, CALIFORNIA
From 25-DEC-21 19:00:00 to 26-DEC-21 06:30:00 (PST-8)
Reported by: Trained Spotter

Spotter report of 4 inches of snow that fell during around a 12-hour duration at an elevation of 3,186 feet.

Heavy Snow in SOUTHERN TRINITY, CALIFORNIA
From 26-DEC-21 00:00:00 to 27-DEC-21 11:00:00 (PST-8)
Reported by: Trained Spotter

Spotter report of 11 inches of snow fell during an unknown duration at an elevation of 3,099 feet.

Heavy Snow in NORTHEASTERN MENDOCINO INTERIOR, CALIFORNIA
From 26-DEC-21 00:00:00 to 27-DEC-21 10:00:00 (PST-8)
Reported by: Social Media

Report of a 34-hour total of 11 inches of snow at an elevation of 2,400 feet.

Heavy Snow in COASTAL DEL NORTE, CALIFORNIA
From 26-DEC-21 02:00:00 to 26-DEC-21 08:00:00 (PST-8)
Reported by: Social Media

Report of a 30-hour total of 7.5 inches of snow fell at an elevation of 2,400 feet.

Heavy Snow in SOUTHERN TRINITY, CALIFORNIA
From 24-DEC-21 11:00:00 to 27-DEC-21 12:00:00 (PST-8)
Reported by: Public

Report of a total accumulation of 42 inches of snow fell during the weekend. Duration, start/stop, heaviest snow times are unknown. Elevation is 3,500 feet.

Heavy Snow in SOUTHERN TRINITY, CALIFORNIA
From 24-DEC-21 12:00:00 to 27-DEC-21 12:00:00 (PST-8)
Reported by: Social Media

Report of a 72-hour total accumulation of 24 inches of snow at an elevation of 2,760 feet. Duration and heaviest snow times is unknown.

Heavy Snow in NORTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 25-DEC-21 00:00:00 to 27-DEC-21 13:30:00 (PST-8)
Reported by: Public

Report of 18 inches of total snow. Start/Stop, duration, and heavy snow times is unknown. Elevation is 2,000 feet.

Heavy Snow in NORTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 24-DEC-21 10:00:00 to 27-DEC-21 09:45:00 (PST-8)
Reported by: Trained Spotter

Spotter report of a 3-day total (72-hours) of 32 inches of snow fell at an elevation of 3,000 feet. Snow began around 10 a.m. on 12/24 and ended around 10 a.m. on 12/27. Exact times of heavy snow, or how many periods of heavy snow, are unknown.

Heavy Snow in NORTHERN TRINITY, CALIFORNIA
From 27-DEC-21 00:00:00 to 27-DEC-21 08:00:00 (PST-8)
Reported by: Social Media

Report of 6 inches of new snow fell at an elevation around 1,900 feet. Duration was around 8-hours.

Heavy Snow in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 25-DEC-21 23:00:00 to 26-DEC-21 09:00:00 (PST-8)
Reported by: Trained Spotter

Spotter report of 10 inches of snow fell overnight at an elevation of 2,450 feet.

Heavy Snow in NORTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 26-DEC-21 00:00:00 to 26-DEC-21 09:30:00 (PST-8)
Reported by: Public

Public report of 7 inches of snow fell overnight at an elevation of 1,400 feet.

Heavy Snow in SOUTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 24-DEC-21 10:00:00 to 27-DEC-21 10:00:00 (PST-8)
Reported by: Trained Spotter

Spotter report of total accumulation of snow was 26 inches. Exact start/stop, duration, and heavy snow times is unknown. Elevation is 2,500 feet.

Heavy Snow in SOUTHERN TRINITY, CALIFORNIA
From 24-DEC-21 10:00:00 to 27-DEC-21 10:00:00 (PST-8)
Reported by: Social Media

Report of 36 inches of total snow from Christmas Eve (12/24) through the morning of 12/27. Start/Stop, duration, times of heavy snow are unknown. Elevation is 2,850 feet.

Heavy Snow in SOUTHERN TRINITY, CALIFORNIA
From 24-DEC-21 11:00:00 to 27-DEC-21 11:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Report of total accumulation of 30 inches. Duration, start/stop, and heavy snow times are unknown. Elevation is 3,500 feet.

Heavy Snow in NORTHERN HUMBOLDT INTERIOR, CALIFORNIA
From 25-DEC-21 07:00:00 to 27-DEC-21 07:00:00 (PST-8)
Reported by: Social Media

Report of 12 inches of snow fell during a 48-hour period at an elevation around 1,600 feet. Exact heaviest snow times is unknown.