A strong atmospheric river brought heavy rain with widespread flooding on the 8th and 9th. Before warmer air moved into the region, there was a period of snow on the 7th as well as freezing rain in some lower valleys lasting into the morning of the 8th. Widespread rainfall totals of 3 to 7 inches fell in and near the Sierra, with heavier amounts between 8 and 12 inches near the Sierra crest.

Flood in PLUMAS, CALIFORNIA
From 08-JAN-17 17:00:00 to 08-JAN-17 17:00:00 (PST-8)
Location: GRAEAGLE
Flood cause: Heavy Rain
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Public

The Middle Fork of the Feather River overflowed onto Highway 89 in Clio. The flooding caused a sinkhole in the road. The damage estimate is from a preliminary damage assessment from CALTRANS.

Winter Weather in LASSEN/EASTERN PLUMAS/EASTERN SIERRA, CALIFORNIA
From 07-JAN-17 02:30:00 to 08-JAN-17 12:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Between 2 and 4 inches of snow fell from early morning to early afternoon on the 7th per observations between Portola and Susanville. From the afternoon of the 7th into the morning of the 8th, snow changed to freezing rain with between 0.1 and 0.5 inches of ice accumulation reported several miles to the west of Susanville.

Flood in LASSEN, CALIFORNIA
From 08-JAN-17 19:30:00 to 09-JAN-17 05:00:00 (PST-8)
Location: DOYLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CALTRANS reported water from Long Valley Creek flowing over Highway 395. The highway was shut down in both directions starting around 1930PST on the 8th. In addition, County Road A26 (near Herlong) was closed due to weakened bridge supports. The end time is approximate and based on the end of heavier rain on the 9th. Damage from this specific event are unknown, although a preliminary damage assessment (CALTRANS) for flood repairs to Highway 395 in January and February totaled $1.8M.

Flood in LASSEN, CALIFORNIA
From 08-JAN-17 15:30:00 to 09-JAN-17 05:00:00 (PST-8)
Location: KARLO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Secret Valley Rest area on Highway 395 was flooded, likely due to the overflow of a branch of Secret Creek. Highway 395 was closed between Wendel Road and Termo at around 2045PST on the 8th. The end time is approximate and based on the end of heavier rain on the 9th. Damages from this specific event are unknown, although a preliminary damage assessment (CALTRANS) for flood repairs to Highway 395 in January and February totaled $1.8M.

Flood in PLUMAS, CALIFORNIA
From 08-JAN-17 17:00:00 to 31-JAN-17 23:59:00 (PST-8)
Location: HINDOO
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

The lowest lying areas of the Sierra Valley near the Middle Fork of the Feather River were inundated due to heavy rain runoff. As the valley drains very slowly, flooding of low-lying areas continued for an extended period of time with additional flooding in February. NOTE: no damage estimates were available.

Debris Flow in NEVADA, CALIFORNIA
From 08-JAN-17 18:00:00 to 08-JAN-17 18:00:00 (PST-8)
Location: NORDEN
Flood cause: Heavy Rain / Snow Melt
Property damage: 480.00K
Crop damage: 0.00K
Reported by: Department of Highways

A large mudslide near the Donner Lake Interchange on Interstate 80 caused the closure of the freeway. The westbound lanes closed at 1802PST, followed by the eastbound lanes (downed power lines) at 1918PST. The road was completely closed between Kingvale and Truckee until 0520PST on the 9th when it was opened for local traffic and law enforcement. The freeway was fully opened at 1040PST on the 9th. The damage estimate was obtained from a preliminary damage assessment from CALTRANS.