A second cold trough moved through Southern California May 19-22nd. Showers and thunderstorms occurred throughout much of the region, and snow was observed in the mountain areas. One to five inches of snow fell in the mountain areas, with the most snowfall in the San Bernardino Mountains. Heavy rain and flash flooding occurred in the Inland Empire. High wind also occurred with the passage of the cold troughs.

Heavy Snow in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 20-MAY-19 03:00:00 to 20-MAY-19 11:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow fell in the San Bernardino Mountains early in the morning on May 20th, dropping 1-5 inches. Chain controls were in effect for the morning hours of May 20th.

High Wind in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 19-MAY-19 15:00:00 to 19-MAY-19 16:00:00 (PST-8)
Magnitude: 68.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet Burns Canyon reported a peak wind gust of 68 knots between 1500 and 1600 PST on May 19th.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 20-MAY-19 22:00:00 to 20-MAY-19 23:00:00 (PST-8)
Magnitude: 68.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet Harrison Park reported a peak wind gust of 68 knots between 2200 and 2300 PST on May 20th.

Strong Wind in APPLE AND LUCERNE VALLEYS, CALIFORNIA
From 21-MAY-19 12:00:00 to 21-MAY-19 15:00:00 (PST-8)
Magnitude: 48.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported power lines down in Lucerne Valley due to strong winds. Power was out for approximately 4-5 hours.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 22-MAY-19 14:00:00 to 22-MAY-19 17:00:00 (PST-8)
Location: CHINO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans reported numerous areas of highway 60 near Chino flooded out due to heavy rain.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 22-MAY-19 13:00:00 to 22-MAY-19 14:00:00 (PST-8)
Location: MONTE VISTA
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans reported a car stuck on Monte Vista Ave and Phillips Ave north of Chino. Water got inside of the vehicle.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 22-MAY-19 15:00:00 to 22-MAY-19 16:00:00 (PST-8)
Location: UPLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported flash flooding and a swift water rescue just north of Upland. It was reported that the vehicle lost control, flipped over and was taking on water.

Flood in ORANGE, CALIFORNIA
From 22-MAY-19 15:00:00 to 22-MAY-19 16:00:00 (PST-8)
Location: (FUL)FULLERTON MUNI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported urban flooding and water going over curbs at the intersection of La Palma and Brookhurst in Anaheim on May 22nd.

Heavy Snow in RIVERSIDE COUNTY MOUNTAINS, CALIFORNIA
From 22-MAY-19 06:00:00 to 22-MAY-19 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow fell in the Riverside County Mountains on May 22nd, dropping 1-4 inches of snow.