A series of storm systems with a subtropical moisture stream swept through the region between the 20th and 22nd of March. This subtropical moisture was also associated with an upper level trough and surface cold front. These systems resulted in minor roadway flooding and debris flows as well as downed trees and power outages due to gusty winds.

Flood in SONOMA, CALIFORNIA
From 22-MAR-18 04:55:00 to 22-MAR-18 05:25:00 (PST-8)
Location: HESSEL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Roadway flooding reported near Rohnert Park Expressway and Stony Point Road.

Flood in SONOMA, CALIFORNIA
From 22-MAR-18 06:15:00 to 22-MAR-18 06:45:00 (PST-8)
Location: SCHELLVILLE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Five vehicles stuck in flooded roadway.

Flood in SONOMA, CALIFORNIA
From 22-MAR-18 06:16:00 to 22-MAR-18 06:46:00 (PST-8)
Location: CUNNINGHAM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding reported near Todd Rd and Llano Rd.

Flood in ALAMEDA, CALIFORNIA
From 22-MAR-18 06:43:00 to 22-MAR-18 07:13:00 (PST-8)
Location: CURTNER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Bus driver reported flooded road on NB 880 just south of Mission.

Flood in SONOMA, CALIFORNIA
From 22-MAR-18 06:50:00 to 22-MAR-18 07:20:00 (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 4404 Redwood Hwy.

Flood in SONOMA, CALIFORNIA
From 22-MAR-18 07:16:00 to 22-MAR-18 07:46:00 (PST-8)
Location: (STS)SANTA ROSA ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roadway flooding reported at Slusser Rd and River Rd.

Strong Wind in NORTHERN SALINAS VALLEY / HOLLISTER VALLEY / CARMEL VALLEY, CALIFORNIA
From 20-MAR-18 15:50:00 to 20-MAR-18 16:00:00 (PST-8)
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Gusty winds blew through portions of Monterey County causing local power outages in North Salinas, Marina, and Fort Ord. At the peak, nearly 4,000 people were without power. Gusty winds went through the Santa Clara Valley as well,  including Hollister gusting to 45 mph https://www.thecalifornian.com/story/news/2018/03/20/more-than-3-000-residents-north-salinas-without-power/444246002/.

Strong Wind in SANTA CRUZ MOUNTAINS, CALIFORNIA
From 21-MAR-18 13:51:00 to 21-MAR-18 13:52:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast media reported that a large tree fell on San Lorenzo Elementary School in Felton yesterday.

Debris Flow in SONOMA, CALIFORNIA
From 22-MAR-18 07:42:00 to 22-MAR-18 08:12:00 (PST-8)
Location: KENWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rock slide in Adobe Canyon near Sugar Loaf Park.

Flash Flood in SONOMA, CALIFORNIA
From 22-MAR-18 04:30:00 to 22-MAR-18 11:00:00 (PST-8)
Location: HESSEL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Beginning at 5:30 AM PDT the stream gauge at Laguna de Santa Rosa at Stony Point Road was in flood stage.  The gauge dropped below flood state at 12:30 PM PDT.