An inslide slider storm system dove across the Western US on February 14th and 15th. This led to high winds occurring over much of the mountains and desert foothills, as well as caused snow levels to fall to around 3000-4000 feet in Southern California.

High Wind in SAN GORGONIO PASS NEAR BANNING, CALIFORNIA
From 14-FEB-23 00:00:00 to 14-FEB-23 15:00:00 (PST-8)
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

High winds occurred across the San Gorgonio Pass mainly during the morning and early afternoon hours on February 14th. Gusts of 55-65 mph were common, along with some localized higher gusts. The Whitewater RAWS site recorded a peak wind gust to 77 mph, and the Snowcreek Canyon SoCal-Edison site recorded a peak wind gust of 72 mph.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 14-FEB-23 00:00:00 to 14-FEB-23 15:00:00 (PST-8)
Magnitude: 81.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds occurred across the San Diego County Mountains mainly during the morning and early afternoon hours on February 14th. Gusts of 55-70 mph were common, along with some localized higher gusts. The Laguna Launch site recorded a peak wind gust to 93 mph, and the Volcan Mountain SDG&E site recorded a peak wind gust of 74 mph.

High Wind in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 14-FEB-23 00:00:00 to 14-FEB-23 15:00:00 (PST-8)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds occurred across the San Bernardino County Mountains mainly during the morning and early afternoon hours on February 14th. Gusts of 50-60 mph were common, along with some localized higher gusts. The Burns Canyon mesonet site recorded a peak wind gust to 65 mph, and the Cajon Lookout SoCal-Edison site recorded a peak wind gust of 60 mph.

Winter Weather in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 14-FEB-23 18:00:00 to 15-FEB-23 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snow levels fell to as low as around 3000 feet in portions of the Inland Empire on the evening of February 14th, allowing for about 0.50-1.00 inch of accumulating snow at these elevations. Reports of very difficult travel conditions were received from CalTrans.

High Wind in APPLE AND LUCERNE VALLEYS, CALIFORNIA
From 14-FEB-23 00:00:00 to 14-FEB-23 15:00:00 (PST-8)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds occurred across the Apple and Lucerne Valleys mainly during the morning and early afternoon hours on February 14th. Multiple SoCal-Edison sites in the Lucerne Valley recorded peak wind gusts of 58 mph. In Phelan, a street sign was blown over in 40-50 mph winds per a report from CalTrans.

Winter Weather in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 14-FEB-23 18:00:00 to 15-FEB-23 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snow levels fell to as low as around 3000 feet in portions of the Inland Empire on the evening of February 14th, allowing for about 2-4 inches of accumulating snow at these elevations. Icy road conditions led to multiple vehicles being trapped near Pine Valley, Warner Springs, and in Julian near S2 and S22 off of Highway 78. A semi truck also jackknifed near Warner Springs. CalTrans issued a Sigalert on San Felipe Road due to the treacherous travel conditions in the area.

Winter Weather in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 14-FEB-23 18:00:00 to 15-FEB-23 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snow levels fell to as low as around 3000 feet in portions of the San Bernardino County Mountans on the evening of February 14th, allowing for about 1-3 inches of accumulating snow at these elevations. Multiple CalTrans reports of vehicles spinning out and sliding off of Highway 189 were received from the Lake Arrowhead and Crestline areas.

Winter Weather in RIVERSIDE COUNTY MOUNTAINS, CALIFORNIA
From 14-FEB-23 18:00:00 to 15-FEB-23 06:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Snow levels fell to as low as around 3000 feet in portions of the Riverside County Mountains on the evening of February 14th, allowing for about 1-3 inches of accumulating snow at these elevations. In Anza, icy road conditions on SR-371 and SR-74 led to multiple trapped vehicles and tow trucks were unable to reach the vehicles, per CalTrans.