A late season Atmospheric River impacted the area in early April. A very moist airmass made landfall across the North Bay before moving southward across the rest of the Bay Area. The Oakland sounding measured record PWAT values of 1.69. The absence of large scale forcing prevent record breaking rainfall. Enough rain did fall, however, to cause minoir/nuisance flooding across much of the region. Numerous flood advisories were issued. Storm total rainfall amounts up to 7 were reported. The bulk of the impacts were felt on April 6,7.

Flood in ALAMEDA, CALIFORNIA
From 06-APR-18 11:26:00 to 06-APR-18 11:56:00 (PST-8)
Location: FRUITVALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at I-880 N and High Street off ramp.

Flood in ALAMEDA, CALIFORNIA
From 06-APR-18 11:30:00 to 06-APR-18 12:00:00 (PST-8)
Location: EMERYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at I-80 W and Ashby Ave off ramp.

Flood in ALAMEDA, CALIFORNIA
From 06-APR-18 11:34:00 to 06-APR-18 12:04:00 (PST-8)
Location: EMERYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at I-80W and Powell Street off ramp.

Flood in MARIN, CALIFORNIA
From 06-APR-18 11:47:00 to 06-APR-18 12:17:00 (PST-8)
Location: FALLON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at SR-1 and Fallon Road.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 09:47:00 to 06-APR-18 10:17:00 (PST-8)
Location: COTATI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at W Sierra Ave and Stony Point Rd.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 10:58:00 to 06-APR-18 11:28:00 (PST-8)
Location: PENNGROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Social media photo showing roadway flooding in Pepper Road.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 11:09:00 to 06-APR-18 11:39:00 (PST-8)
Location: MANZANA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at Green Valley Road and SR-116.

Flood in MARIN, CALIFORNIA
From 06-APR-18 04:18:00 to 06-APR-18 04:48:00 (PST-8)
Location: CARTE MADERA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at 53 San Clemente Drive.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 11:30:00 to 06-APR-18 12:00:00 (PST-8)
Location: CADWELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at Bloomfield and Blucher Valley Rd. Entire roadway covered in approximately 2 feet of water.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 11:30:00 to 06-APR-18 12:00:00 (PST-8)
Location: SONOMA COUNTY ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at Mark West Station Rd and Starr Rd.

Flood in SANTA CLARA, CALIFORNIA
From 06-APR-18 06:16:00 to 06-APR-18 06:46:00 (PST-8)
Location: SAN JOSE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported on SB-87 to SB-280 connecting ramp.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 08:25:00 to 06-APR-18 08:55:00 (PST-8)
Location: FREESTONE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at Freestone Valley Ford Rd and Bodega Hwy.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 09:07:00 to 06-APR-18 09:37:00 (PST-8)
Location: MOLINO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at 1298 High School Road. Roadway completely flooded, vehicles reportedly hydroplaning.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 10:18:00 to 06-APR-18 10:48:00 (PST-8)
Location: SANTA ROSA ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at Old Redwood Highway and Mendocino Ave. NB lane is heavily flooded and the SB lane is starting to flood.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 09:49:00 to 06-APR-18 10:19:00 (PST-8)
Location: SANTA ROSA ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at Old Redwood Highway and Angela Dr.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 09:57:00 to 06-APR-18 10:27:00 (PST-8)
Location: WILFRED
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at 6100 Labath Ave. Water on both sides of road.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 10:35:00 to 06-APR-18 11:05:00 (PST-8)
Location: SCHELLVILLE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at SR-121 and Sears Point Dr. SB lane completely flooded.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 12:08:00 to 06-APR-18 12:38:00 (PST-8)
Location: TWO ROCK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding at Bodega Ave and Valley Ford Road.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 12:47:00 to 06-APR-18 13:17:00 (PST-8)
Location: CADWELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at Canfield Rd and Schaeffer Rd.

Flood in ALAMEDA, CALIFORNIA
From 06-APR-18 13:47:00 to 06-APR-18 14:17:00 (PST-8)
Location: EMERYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at I-980 E and I-580 W connecting.

Flood in CONTRA COSTA, CALIFORNIA
From 07-APR-18 00:24:00 to 07-APR-18 00:54:00 (PST-8)
Location: SELBY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

I-80 E adjacent to the Pomona on ramp, 2 feet of water in number 1 lane.

Flood in SAN FRANCISCO, CALIFORNIA
From 06-APR-18 20:21:00 to 06-APR-18 20:51:00 (PST-8)
Location: SAN FRANCISCO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

I-80 at 7th St in San Francisco, all lanes flooded, 1.5 feet deep.

Flood in SAN FRANCISCO, CALIFORNIA
From 06-APR-18 12:20:00 to 06-APR-18 12:50:00 (PST-8)
Location: SAN FRANCISCO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at I-80W and Harrison St off ramp.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 14:11:00 to 06-APR-18 14:41:00 (PST-8)
Location: BODEGA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at Joy Rd and Bodega Highway.

Flood in ALAMEDA, CALIFORNIA
From 06-APR-18 14:15:00 to 06-APR-18 14:45:00 (PST-8)
Location: EMERYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding at I-580 W and I-80 E.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 14:24:00 to 06-APR-18 14:54:00 (PST-8)
Location: BLOOMFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding at Valley Ford Road and Bloomfield Road.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 12:44:00 to 06-APR-18 13:14:00 (PST-8)
Location: AGUA CALIENTE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at Brookside Rd and W Agua Caliente Rd.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 12:45:00 to 06-APR-18 13:15:00 (PST-8)
Location: BODEGA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Bodega Highway at Salmon Creek closed due to flooding.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 12:41:00 to 06-APR-18 13:11:00 (PST-8)
Location: BARLOW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at Sexton Road and Bodega Highway.

Flood in SONOMA, CALIFORNIA
From 06-APR-18 12:30:00 to 06-APR-18 13:00:00 (PST-8)
Location: COTATI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

West Railroad Ave closed near Cypress Ave due to flooding.

Flood in SAN FRANCISCO, CALIFORNIA
From 07-APR-18 01:20:00 to 07-APR-18 01:50:00 (PST-8)
Location: SAN FRANCISCO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding at 6th St on ramp to I-280 S 8 to 10 inches of water in number 1 and 2 lanes.

Flood in ALAMEDA, CALIFORNIA
From 07-APR-18 02:02:00 to 07-APR-18 02:32:00 (PST-8)
Location: CURTNER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

NB 880 just south of exit 12-A Mission Blvd, 5 inches of water in HOV lane.

Flood in SAN MATEO, CALIFORNIA
From 07-APR-18 02:02:00 to 07-APR-18 02:32:00 (PST-8)
Location: (SQL)SAN CARLOS ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

SB 101 just north of Ralston Ave 3 inches of water in 1 lane.

Flood in SAN MATEO, CALIFORNIA
From 07-APR-18 02:02:00 to 07-APR-18 02:32:00 (PST-8)
Location: SAN MATEO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

US 101 at 3rd Ave on ramp, severe flooding in 1 lane.

Flood in SAN MATEO, CALIFORNIA
From 07-APR-18 05:26:00 to 07-APR-18 05:56:00 (PST-8)
Location: LOMITA PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

US 101 NB at SFO large flooding number 1 lane.

Debris Flow in SONOMA, CALIFORNIA
From 06-APR-18 12:00:00 to 07-APR-18 12:30:00 (PST-8)
Location: PRESTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Geysers road between Pine Mountain Road and Hale Ranch is closed due to a slide.

Flood in SAN FRANCISCO, CALIFORNIA
From 07-APR-18 04:10:00 to 07-APR-18 04:40:00 (PST-8)
Location: OCEAN VIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

US 101 N at Alemany Blvd off ramp, number 1 lane flooded 6 to 8 inches deep.

Debris Flow in SAN MATEO, CALIFORNIA
From 07-APR-18 08:05:00 to 07-APR-18 08:35:00 (PST-8)
Location: BUTANO PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reporting mud/dirt/rocks covering northbound Highway 1 near Anderson Canyon.

Debris Flow in SONOMA, CALIFORNIA
From 06-APR-18 16:19:00 to 06-APR-18 16:49:00 (PST-8)
Location: BODEGA BAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mud blocking lanes at SR-1 and Bay Hill Road.

Debris Flow in SONOMA, CALIFORNIA
From 06-APR-18 15:20:00 to 06-APR-18 15:50:00 (PST-8)
Location: COTATI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Mudslide reported at US-101 N and Railroad Ave.