Three storm systems swept through the region between January 18-23. The first occurred on January 18 as a cold front moved through. Heavy rain, widespread flooding, and debris flows were observed.

Flood in SONOMA, CALIFORNIA
From 18-JAN-17 15:05:00 to 18-JAN-17 17:05:00 (PST-8)
Location: FORESTVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Greenvalley Creek flooding across all lanes of Hwy 116 at junction of Travis Rd.

Flood in SONOMA, CALIFORNIA
From 18-JAN-17 15:05:00 to 18-JAN-17 17:05:00 (PST-8)
Location: CHIQUITA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding at offramp of Hwy 101 and Dry Creek Rd.

Flood in SONOMA, CALIFORNIA
From 18-JAN-17 15:51:00 to 18-JAN-17 17:51:00 (PST-8)
Location: SONOMA COUNTY ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Vehicle stuck in flood waters across Mark West Dr at Starr.

Flood in SONOMA, CALIFORNIA
From 18-JAN-17 16:18:00 to 18-JAN-17 18:18:00 (PST-8)
Location: SONOMA COUNTY ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mark West Station at Starr closed...3ft of moving water.

Flood in SONOMA, CALIFORNIA
From 18-JAN-17 17:36:00 to 18-JAN-17 19:36:00 (PST-8)
Location: WINDSOR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Widespread flooded roadways at Arata and Los Amigos.

Flood in SONOMA, CALIFORNIA
From 18-JAN-17 17:55:00 to 18-JAN-17 19:55:00 (PST-8)
Location: MARK WEST
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reporting widespread standing water west side of Shilo at HWY 101. He had received 2.5 inches today.

Flood in SONOMA, CALIFORNIA
From 18-JAN-17 19:30:00 to 18-JAN-17 21:30:00 (PST-8)
Location: MOLINO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Willowside Rd/Hall Rd roadway is completely flooded.

Flood in SONOMA, CALIFORNIA
From 18-JAN-17 20:05:00 to 18-JAN-17 22:05:00 (PST-8)
Location: SCHELLVILLE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hwy 121 at junction of Hwy 12 closed due to flooding.

Flood in SANTA CLARA, CALIFORNIA
From 18-JAN-17 20:40:00 to 18-JAN-17 22:40:00 (PST-8)
Location: (SJC)SAN JOSE INTL A
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooded Junction Ave between Charcot and Hartog.

Flood in SANTA CRUZ, CALIFORNIA
From 18-JAN-17 21:09:00 to 18-JAN-17 23:09:00 (PST-8)
Location: RIVERSIDE GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hwy 17 at Bear Creek Rd pooling of water 3 inches deep. 2.15 inches of rain from 6PM to 9PM.

Flood in MARIN, CALIFORNIA
From 18-JAN-17 21:22:00 to 18-JAN-17 23:22:00 (PST-8)
Location: TOMALES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Closure of Hwy 1 at Tomales Rd due to flooding.

Heavy Rain in SAN FRANCISCO, CALIFORNIA
From 18-JAN-17 19:21:00 to 18-JAN-17 20:21:00 (PST-8)
Location: SAN FRANCISCO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Very heavy rain rates near 2.5 inches per hour.

Debris Flow in SONOMA, CALIFORNIA
From 18-JAN-17 15:53:00 to 18-JAN-17 17:53:00 (PST-8)
Location: RIO NIDO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mud/rock/dirt slide into river road near Korbel.

Debris Flow in SANTA CRUZ, CALIFORNIA
From 18-JAN-17 17:36:00 to 18-JAN-17 19:36:00 (PST-8)
Location: PARADISE PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Large boulders blocking one lane of hwy 9 and several other boulders falling into roadway junction of old times rd.

Debris Flow in SANTA CRUZ, CALIFORNIA
From 18-JAN-17 18:02:00 to 18-JAN-17 20:02:00 (PST-8)
Location: FOREST PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Culvert flooding. Large amounts of water getting in roadway at hwy 9 and Bear Creek Road.

Debris Flow in SANTA CLARA, CALIFORNIA
From 18-JAN-17 18:02:00 to 18-JAN-17 20:02:00 (PST-8)
Location: REDWOOD ESTATES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mud/rock/dirt slide blocking one lane heading towards hwy 17 from Bear Creek Rd.

Debris Flow in SAN MATEO, CALIFORNIA
From 18-JAN-17 21:22:00 to 18-JAN-17 23:22:00 (PST-8)
Location: LA HONDA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mud slide blocking portions of hwy 84.

High Wind in SANTA CLARA VALLEY INCLUDING SAN JOSE, CALIFORNIA
From 18-JAN-17 15:53:00 to 18-JAN-17 16:00:00 (PST-8)
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree down, 50 ft, blocking north bound lanes Lawrence Expressway at Monroe.

Flash Flood in SONOMA, CALIFORNIA
From 18-JAN-17 19:30:00 to 18-JAN-17 22:30:00 (PST-8)
Location: EL VERANO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Heavy rain resulted in flooding on the Sonoma Creek.  The Sonoma Creek stream gauge at Agua Caliente rose above flood stage at 7:30 pm PST on January 18 and remained above flood stage until 10:30 pm PST.

Flash Flood in SONOMA, CALIFORNIA
From 18-JAN-17 19:45:00 to 19-JAN-17 01:45:00 (PST-8)
Location: HESSEL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Heavy rain on January 18 caused the Laguna de Santa Rosa to flood. The stream gauge on the Laguna de Santa Rosa at Stony Point Road rose above flood stage at 7:45 pm PST on January 18 and remained above flood stage until 1:45 am PST on January 19.

Flash Flood in SANTA CRUZ, CALIFORNIA
From 20-JAN-17 07:25:00 to 20-JAN-17 08:30:00 (PST-8)
Location: MT HERMON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Heavy rain in the Santa Cruz Mountains resulted in flooding on the San Lorenzo River.  The San Lorenzo stream gauge at Big Trees rose above flood stage at 7:25 am PST on January 20 and remained above flood stage until 8:30 am PST.

Debris Flow in SANTA CRUZ, CALIFORNIA
From 18-JAN-17 20:44:00 to 18-JAN-17 22:44:00 (PST-8)
Location: RIVERSIDE GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Lines, trees, and mud almost covering entire roadway of Bear Creek Rd at Deerwood Dr.

Debris Flow in NAPA, CALIFORNIA
From 18-JAN-17 21:20:00 to 18-JAN-17 23:20:00 (PST-8)
Location: LOKOYA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mud slide covering west bound lane of Dry Creek Rd.

Flash Flood in SONOMA, CALIFORNIA
From 20-JAN-17 04:45:00 to 20-JAN-17 08:00:00 (PST-8)
Location: AGUA CALIENTE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Heavy rain resulted in flash flooding on both the Willow Brook at Penngrove and Sonoma Creek at Agua Caliente.  The Sonoma Creek stream gauge at Agua Caliente rose above flood stage at 4:45 am on January 20 and remained above flood stage until 8 am that day.

Flash Flood in SONOMA, CALIFORNIA
From 22-JAN-17 04:15:00 to 22-JAN-17 08:30:00 (PST-8)
Location: AGUA CALIENTE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Heavy rain on January 22, 2017, resulted in flooding on the Sonoma Creek.  The Sonoma Creek stream gauge at Agua Caliente rose above flood stage at 4:15 AM PST on January 22 and remained above flood stage until 8:30 AM PST.

Debris Flow in SANTA CLARA, CALIFORNIA
From 22-JAN-17 08:12:00 to 22-JAN-17 11:15:00 (PST-8)
Location: NEW ALMADEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Remote rain gauge data in the Loma Burn Scar indicated rain rates approaching 0.75 per hour, rates that were predetermined to cause debris flows in the burn scar.

Flash Flood in SAN BENITO, CALIFORNIA
From 22-JAN-17 11:45:00 to 22-JAN-17 16:00:00 (PST-8)
Location: DUNNEVILLE CORNERS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Heavy rain on January 24 caused the Pacheco Creek in San Benito County to flood.  The Pacheco Creek stream gauge near Dunneville rose above flood stage at 11:45 am PST on January 22 and remained above flood stage until 4 pm PST on January 22.

Flash Flood in SAN BENITO, CALIFORNIA
From 20-JAN-17 10:30:00 to 20-JAN-17 16:15:00 (PST-8)
Location: SAN FELIPE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Pacheco Creek near Dunneville flooded.  A stream gauge on the Pacheco Creek near Dunneville rose above flood stage at 10:30 AM PST and remained above flood stage until 4:15 PM PST.