A closed upper low pressure system, combined with remnant tropical cyclone moisture, brought heavy rain and mountain snow to southern California. Across the area, 1 to 4 inches of rain fell, which was heaviest on the 19th and 20th. Rainfall rates of 0.50 to 1 inch per hour observed which caused impacts to many areas including Valley Center, Alpine and the Mexico border. A waterspout was spotted (photo) just west of San Clemente and Dana Point (LA waters) on the 20th, with another possible waterspout sighting on the 21st. Snow was observed down to 4200 feet.

Heavy Snow in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 19-NOV-19 08:00:00 to 21-NOV-19 10:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Many locations in the San Bernardino Mountains reported over 5 inches of snow over 48 hours. Green Valley Lake was the highest with 13 inches of snow. Arrowbear and Running Springs reported 9 inches of snow. Big Bear resorts and Mount Baldy reported 5 inches of snow.

Flash Flood in RIVERSIDE, CALIFORNIA
From 20-NOV-19 13:00:00 to 20-NOV-19 16:00:00 (PST-8)
Location: CABAZON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway 243 was washed away from heavy rain and closed from Twin Pines to Banning.

Flood in ORANGE, CALIFORNIA
From 19-NOV-19 16:00:00 to 19-NOV-19 21:00:00 (PST-8)
Location: SAN CLEMENTE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Local Official

Harmony Grove Road flooded between 1600 and 2100 PST on November 19th due to heavy rain.

Lightning in SAN DIEGO, CALIFORNIA
From 19-NOV-19 18:00:00 to 19-NOV-19 19:00:00 (PST-8)
Location: RAMONA ARPT
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Fire Department/Rescue

Lightning struck a pine tree near Ramona, catching it on fire. The fire then spread to many nearby palm trees. The fire departments had to suppress the fires.

Heavy Snow in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 20-NOV-19 08:00:00 to 20-NOV-19 12:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans reported heavy snow of 1-3 inches on Highway 18 in the Arctic Circle, with chain controls in place.

Flood in SAN DIEGO, CALIFORNIA
From 20-NOV-19 08:00:00 to 20-NOV-19 11:00:00 (PST-8)
Location: SAN YSIDRO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Swift water rescue occurred on Otay Mesa Road for 2 people trapped in a car due to flooding around 0815 PST on November 20th.

Flood in SAN DIEGO, CALIFORNIA
From 20-NOV-19 10:00:00 to 20-NOV-19 13:00:00 (PST-8)
Location: SAN YSIDRO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A swift water rescue occurred on Dairy Mart Road for 2 people in a truck at a low water crossing near the Tijuana River.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 20-NOV-19 11:00:00 to 20-NOV-19 13:00:00 (PST-8)
Location: FALLBROOK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans reported that a vehicle spun off the road in Fallbrook and resulted in the car falling 100 feet down an embankment due to heavy rain.

Flood in SAN DIEGO, CALIFORNIA
From 20-NOV-19 19:00:00 to 20-NOV-19 22:00:00 (PST-8)
Location: GRANTVILLE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast media reported 12 San Diego State University dorm rooms flooded from heavy rain on the evening of the 20th. Water was entering the first floor of the dorm room.

Flash Flood in SAN DIEGO, CALIFORNIA
From 21-NOV-19 05:00:00 to 21-NOV-19 08:00:00 (PST-8)
Location: VALLEY CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flash flooding at Cumbres Road, northwest of Valley Center. One inch in one hour was observed in one hour, and two inches of rain fell the day before. Some damage was reported in the area.

Flash Flood in SAN DIEGO, CALIFORNIA
From 19-NOV-19 18:00:00 to 19-NOV-19 21:00:00 (PST-8)
Location: WARNER SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported a large boulder in the road on Highway 79 south of Warner Springs around 1800 PST on November 19th due to heavy rain.