This upper-level low pressure system developed right on the heels of the last and became a closed low over the Northern Baja for 2 days, drawing moisture back into the area along with strong, widespread offshore winds. This system also set off intense showers and isolated thunderstorms with pea-sized hail (accumulations in Rancho Cucamonga and Mission Viejo), as well as several funnel clouds spotted east of John Wayne Airport. Most of the rain with this system was confined to Orange County, the Inland Empire and the northern mountains. Heavy rain was observed in Orange County and the Inland Empire on the 15th and 16th with locations there recording between one-quarter and one-half inch.  The snow level dropped to around 3500 ft., with accumulations of 3 to 8 inches there. Bear Mountain resort recorded 12 to 16 inches. Strong winds were also observed with this storm, especially on the 16th, which was a more widespread wind event than early December, impacting all counties, including San Diego County, with warning-level winds. Several wind gusts of 45-65 mph were reported in the Santa Ana Mountains, the Inland Empire and San Diego County Mountains. Several trees and power poles were downed, leaving many without power.

High Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 16-DEC-11 13:00:00 to 16-DEC-11 16:00:00 (PST-8)
Magnitude: 63.00 MG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: RAWS

High winds began at the Highland Springs RAWS between 1316 and 1416 PST on the 16th and ended between 1516 and 1616 PST. During this time a peak gust of 63 mph was recorded between 1416 and 1516.
Several trees and power lines were reported down in the Hemet area of Riverside County shortly after this report.

Winter Weather in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 17-DEC-11 13:00:00 to 18-DEC-11 13:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The Bear Mountain Resort near Big Bear City reported a 24 hour snowfall total of 12 to 16 inches at 7500 feet elevation, approximately half of which fell between 0700 and 1300 PST on the 18th.

Funnel Cloud in ORANGE, CALIFORNIA
From 15-DEC-11 13:00:00 to 15-DEC-11 13:30:00 (PST-8)
Location: (SNA)SANTA ANA CO AR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Multiple funnel cloud reports from the KSNA ASOS at 10 and 15 miles east of John Wayne Airport.

Funnel Cloud in SAN BERNARDINO, CALIFORNIA
From 15-DEC-11 15:45:00 to 15-DEC-11 16:15:00 (PST-8)
Location: FONTANA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two funnel clouds estimated 10 miles to the north of the spotter, who is located in Riverside near Jarupa Avenue and Grand Avenue.

High Wind in SANTA ANA MOUNTAINS AND FOOTHILLS, CALIFORNIA
From 16-DEC-11 03:30:00 to 16-DEC-11 14:30:00 (PST-8)
Magnitude: 56.00 MG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds began at the Fremont Canyon RAWS between 0351 and 0451 PST on the 16th and ended between 1351 and 1451 PST the same day. During that time a max gust of 65 mph was measured, along with several other gusts above 58 mph (including 2 of 61 mph and one of 60 mph).
During this time, power poles were reported down by Fox 11 News in nearby Yorba Linda. Around 240 customers were reported without power in nearby Tustin as well.

Strong Wind in SAN DIEGO COUNTY VALLEYS, CALIFORNIA
From 16-DEC-11 20:00:00 to 16-DEC-11 23:00:00 (PST-8)
Magnitude: 48.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong winds damaged the patio roof on the property. Tree limbs as large as 4 inches in diameter have been breaking off trees. Property is located on Pala Mesa Road near SR 76 near Fallbrook.