The first in a series of three atmospheric river events between January 2 and January 10. Strong winds, flooding, and debris flows occurred throughout this event. Snow was also recorded at higher elevations.

Flood in NAPA, CALIFORNIA
From 03-JAN-17 23:58:00 to 04-JAN-17 00:58:00 (PST-8)
Location: YOUNTVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Two feet of water in the road near Heather and Oak Circle. Road has been temporarily closed.

High Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 03-JAN-17 08:22:00 to 03-JAN-17 08:27:00 (PST-8)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Los Gatos Raws. Elevation 1842 feet.

High Wind in NORTHERN MONTEREY BAY, CALIFORNIA
From 03-JAN-17 08:47:00 to 03-JAN-17 08:52:00 (PST-8)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Very large tree blocking roadway in Pebble Beach at Sloat Rd and Aztec Rd.

High Wind in NORTHERN MONTEREY BAY, CALIFORNIA
From 03-JAN-17 09:19:00 to 03-JAN-17 09:24:00 (PST-8)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Large tree down in roadway at fort rd.

High Wind in NORTHERN MONTEREY BAY, CALIFORNIA
From 03-JAN-17 09:20:00 to 03-JAN-17 09:25:00 (PST-8)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree down across hwy 1 near pacific valley.

High Wind in SAN FRANCISCO PENINSULA COAST, CALIFORNIA
From 03-JAN-17 09:23:00 to 03-JAN-17 09:28:00 (PST-8)
Magnitude: 62.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Elevation 900 feet. At 1 S Sausalito in Marin County.

High Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 03-JAN-17 10:46:00 to 03-JAN-17 10:51:00 (PST-8)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees down on roadway, SR 152 near Mt. Madonna.

Debris Flow in SANTA CRUZ, CALIFORNIA
From 04-JAN-17 12:49:00 to 04-JAN-17 13:59:00 (PST-8)
Location: BEN LOMOND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Rock and water on roadway at state route 9 and Woodland Dr.

Debris Flow in SANTA CRUZ, CALIFORNIA
From 04-JAN-17 12:51:00 to 04-JAN-17 13:51:00 (PST-8)
Location: FELTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mud dirt and rock across roadway at Felton Empire Rd and Bennett Creek Trail.

Debris Flow in SANTA CRUZ, CALIFORNIA
From 04-JAN-17 02:08:00 to 04-JAN-17 03:08:00 (PST-8)
Location: SANTA CRUZ
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree down and heavy debris/mud slide across entire roadway.

Debris Flow in SONOMA, CALIFORNIA
From 04-JAN-17 02:47:00 to 04-JAN-17 03:47:00 (PST-8)
Location: MARK WEST SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Entire lane blocked by debris WB Calistoga Rd and Gates Rd.

Flash Flood in MONTEREY, CALIFORNIA
From 04-JAN-17 03:47:00 to 04-JAN-17 04:47:00 (PST-8)
Location: ELKHORN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Three feet of water in roadway near Paradise Rd/Lakeview Dr intersection.

Flash Flood in SONOMA, CALIFORNIA
From 04-JAN-17 02:00:00 to 04-JAN-17 10:00:00 (PST-8)
Location: COTATI
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 5.00K
Reported by: River/Stream Gage

Colgan Creek near Sebastopol went above flood stage.

Debris Flow in MONTEREY, CALIFORNIA
From 04-JAN-17 04:40:00 to 04-JAN-17 10:40:00 (PST-8)
Location: NOTLEYS LNDG
Flood cause: Heavy Rain / Burn Area
Property damage: 5.00K
Crop damage: 5.00K
Reported by: Mesonet

Rain gauges in the burn scar were experiencing rain rates between 0.75-1.5 per hour, exceeding pre-established thresholds for debris flows.  Damage are estimates.

Flash Flood in SANTA CLARA, CALIFORNIA
From 04-JAN-17 15:30:00 to 04-JAN-17 17:30:00 (PST-8)
Location: CARNADERO
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 5.00K
Reported by: Broadcast Media

Media reported flash flooding of Uvas Creek overflowing near Christmas Hill Park in Gilroy, CA. Damage are estimates.

Flood in SONOMA, CALIFORNIA
From 03-JAN-17 18:05:00 to 03-JAN-17 19:05:00 (PST-8)
Location: TRENTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Eastside road at Trenton Healdsburg Road entire roadway flooded.

Flood in SANTA CLARA, CALIFORNIA
From 03-JAN-17 20:07:00 to 03-JAN-17 21:07:00 (PST-8)
Location: CAMPBELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding. 1 foot deep in right lane of I-280 and Saratoga Ave.

Flood in SAN FRANCISCO, CALIFORNIA
From 04-JAN-17 04:55:00 to 04-JAN-17 05:55:00 (PST-8)
Location: OCEAN VIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

US 101 S and Paul Ave Offramp. Vehicles hydroplaning. Unknown depth, possibly several inches.

Flood in SANTA CLARA, CALIFORNIA
From 04-JAN-17 05:52:00 to 04-JAN-17 06:52:00 (PST-8)
Location: OLD GILROY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

WB SR152 and Ferguson. Flood water in area.

Debris Flow in SONOMA, CALIFORNIA
From 03-JAN-17 05:11:00 to 03-JAN-17 06:11:00 (PST-8)
Location: RIO NIDO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mud dirt rocks on roadway. Rio Nido Road and Armstrong Road.

Debris Flow in ALAMEDA, CALIFORNIA
From 03-JAN-17 05:47:00 to 03-JAN-17 06:47:00 (PST-8)
Location: NILES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

State route 84 and Palomares Road. Mud and rocks blocking east bound side.

Debris Flow in NAPA, CALIFORNIA
From 03-JAN-17 05:51:00 to 03-JAN-17 06:51:00 (PST-8)
Location: IMOLA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mud and rocks in roadway. State route 121 at wild horse.

Debris Flow in SANTA CRUZ, CALIFORNIA
From 03-JAN-17 06:05:00 to 03-JAN-17 07:05:00 (PST-8)
Location: MT HERMON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mud/dirt/rocks in south bound lane at SR 9 and Felton Empire Road.

Strong Wind in SAN FRANCISCO PENINSULA COAST, CALIFORNIA
From 03-JAN-17 07:09:00 to 03-JAN-17 07:14:00 (PST-8)
Magnitude: 48.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Golden gate bridge mid span.

Strong Wind in EAST BAY HILLS AND THE DIABLO RANGE, CALIFORNIA
From 03-JAN-17 08:17:00 to 03-JAN-17 08:22:00 (PST-8)
Magnitude: 45.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Las trampas raws. Elevation 1760 feet.

Flood in SONOMA, CALIFORNIA
From 03-JAN-17 17:40:00 to 03-JAN-17 18:40:00 (PST-8)
Location: WINDSOR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding. Eastside Road and Windsor River Road. Approximately 18 inches of water across lanes.

Flood in SAN FRANCISCO, CALIFORNIA
From 04-JAN-17 03:19:00 to 04-JAN-17 04:19:00 (PST-8)
Location: SAN FRANCISCO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water a couple of feet high 2 right lanes nb 101 eb 80 connection.