An upper level trough brought notable lower elevation rain and mountain snow across Southern California from November 7th - 9th. The cold nature of the system also brought chilly temperatures to the region, especially in areas of the High Desert.

Winter Storm in RIVERSIDE COUNTY MOUNTAINS, CALIFORNIA
From 07-NOV-20 08:00:00 to 09-NOV-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Areas of heavy snow impacted the Riverside County Mountains, such as in Idyllwild, where the storm total snow observed was 6 inches.

Winter Storm in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 07-NOV-20 08:00:00 to 09-NOV-20 20:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy snow fell in portions of the San Bernardino Mountains. Notable totals occurred at Big Bear Snow Summit Ski Resort, where 18 inches of snow fell at at 8,800 feet and 16 inches at Green Valley Lake. CalTrans closed a large portion of Route 38 on the 9th due to heavy snow, along with large power lines and trees down on the road.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 07-NOV-20 08:00:00 to 09-NOV-20 20:00:00 (PST-8)
Location: PINE HILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Areas of heavy rainfall occurred across the mountains and valleys of San Diego County. Notable totals occurred at Lake Cuyamaca with 3.98 inches of rain and Pine Valley with 3.31 inches of rain.

High Surf in ORANGE COUNTY COASTAL, CALIFORNIA
From 07-NOV-20 16:00:00 to 07-NOV-20 19:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Lifeguard

Lifeguards at Huntington Beach report high surf of 8 feet at 4 PM.

Strong Wind in COACHELLA VALLEY, CALIFORNIA
From 07-NOV-20 00:00:00 to 09-NOV-20 20:00:00 (PST-8)
Magnitude: 47.00 EG
Property damage: 2000.00K
Crop damage: 0.00K
Reported by: ASOS

Gusty winds occurred across the Coachella Valley over this period. Earlier in the period, a trained spotter reported a 46 mph wind gust with uprooted trees and broken tree limbs in the city of Coachella. The Thermal ASOS recorded a wind gust 54 MPH as well.  In the late afternoon of the 8th, CHP report of downed light pole blocking Jackson St. just south of 58th Ave. where, Thermal ASOS had gusts to 33 mph at the time, however, a surfacing mountain wave may have produced higher gusts at this location.

High Wind in APPLE AND LUCERNE VALLEYS, CALIFORNIA
From 07-NOV-20 00:00:00 to 08-NOV-20 20:00:00 (PST-8)
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Gusty winds occurred across the High Desert. Cushenbury Springs observation site reported a 68 MPH wind gust at 4:30 AM on the 7th.

Flood in SAN BERNARDINO, CALIFORNIA
From 07-NOV-20 10:49:00 to 07-NOV-20 12:00:00 (PST-8)
Location: ESPERANZA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reports roadway flooding is occurring on carbon canyon road in various locations in carbon canyon. flooding is ranging from 1/2 an inch to 2 inches.

Frost/Freeze in APPLE AND LUCERNE VALLEYS, CALIFORNIA
From 09-NOV-20 01:00:00 to 10-NOV-20 15:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Portions of the High Desert saw cold temperatures with patchy areas of frost. The low temperature in Apple Valley dropped to 19 degrees on the afternoon of the 10th.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 07-NOV-20 02:00:00 to 08-NOV-20 16:00:00 (PST-8)
Magnitude: 63.00 MG
Crop damage: 0.00K
Reported by: Department of Highways

Gusty winds occurred in the San Diego mountains. UC San Diego HPWREN Network observation station measured a 72 MPH wind gust. Gusty winds led to a tree, approximately 14 inches in diameter, blocking road completely at Highway 76 / Highway 79 interchange. Observations near Lake Henshaw report wind gusts of 38-39 mph with sustained winds of 28-29 mph out of the southwest from 1:10 pm until 1:30 pm on the 8th.

Winter Weather in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 07-NOV-20 08:00:00 to 08-NOV-20 16:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Portions of the mountains in San Diego County received significant snowfall. Mt. Laguna measured a total of 7 inches, while Palomar Mountain measured 4 inches of snow.