A wet system brought periods of moderate to heavy rain with scattered thunderstorms. Lines of stronger thunderstorms brought local road flooding to portions of interior Northern California. There was also a confirmed EF-1 tornado touchdown in the Oroville area, with minor damage. Snow levels were high, with impacts limited to minor travel delays for Sierra pass levels.

Flood in SOLANO, CALIFORNIA
From 18-DEC-23 06:40:00 to 18-DEC-23 12:40:00 (PST-8)
Location: FAIRFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported standing water on I-80 West at the Waterman Blvd. off-ramp.

Flood in SAN JOAQUIN, CALIFORNIA
From 18-DEC-23 09:01:00 to 18-DEC-23 15:01:00 (PST-8)
Location: COLLIERVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported roadway flooding at Lower Sacramento Rd. and E Woodson Rd.

Flood in TEHAMA, CALIFORNIA
From 19-DEC-23 07:48:00 to 19-DEC-23 13:48:00 (PST-8)
Location: MILL CREEK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP/Cal Trans reported a rock slide on the road near Potato Patch Campground. Rocks were in both lanes and are being cleared by Cal Trans.

Flood in EL DORADO, CALIFORNIA
From 19-DEC-23 19:22:00 to 19-DEC-23 23:22:00 (PST-8)
Location: PACIFIC
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported Mud/Dirt/Rock starting to come downhill and cross the roadway, US50/Bridal Veil Falls, eastbound.

Flood in STANISLAUS, CALIFORNIA
From 18-DEC-23 11:34:00 to 18-DEC-23 17:34:00 (PST-8)
Location: CHEMURGIC
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported roadway flooding at the intersection of Fulkerth Rd and Faith Home Rd.

Flood in SACRAMENTO, CALIFORNIA
From 18-DEC-23 07:13:00 to 18-DEC-23 13:13:00 (PST-8)
Location: SACRAMENTO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported that the #1 lane at southbound I5 - US 50 E connection/P St on-amp had 2-3 inches of water collected on the roadway.

Flood in SOLANO, CALIFORNIA
From 18-DEC-23 06:30:00 to 18-DEC-23 12:30:00 (PST-8)
Location: FAIRFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported roadway flooding on I-80 Eastbound/Travis Blvd off-ramp.

Heavy Rain in SHASTA, CALIFORNIA
From 18-DEC-23 09:34:00 to 18-DEC-23 09:34:00 (PST-8)
Location: LAMOINE
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported /responded to HAZMAT incident caused by a truck hydroplaning on I-5N near Lamoine Rd due to moderate to heavy rain. The incident was mostly cleared at 1:30 PM PST. There was 1.25 of rain reported.

Tornado in BUTTE, CALIFORNIA
From 19-DEC-23 17:40:00 to 19-DEC-23 17:42:00 (PST-8)
Location: (CIC)CHICO MUNI ARPT
Tornado F-scale: EF1
Property damage: 17.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

National Weather Service Meteorologists surveyed storm damage in Oroville, and analyzed radar and video evidence. It was determined that an EF-1 tornado, associated with a line of thunderstorms, moved through for about 2 minutes before lifting, resulting in tree and minor structure damage.