At the end of December, one final winter storm rolled across Central and Southern California. The storm produced between 0.50 and 1.50 inches of rainfall across the area. As the storm moved through the area, snow levels dropped to around 4000 feet. With the lowering snow levels, 4 to 8 inches of new snowfall was reported in the mountains. Along with the precipitation, this storm system produced strong and damaging northerly winds across the area. Wind gusts in excess of 60 MPH were reported both in the mountains and the valley areas of Southern California. With the ground already saturated from previous rainfall, the strong winds toppled many trees, producing scattered power outages and road blockages.

High Wind in SANTA BARBARA COUNTY SOUTH COAST, CALIFORNIA
From 29-DEC-10 16:30:00 to 30-DEC-10 06:00:00 (PST-8)
Magnitude: 40.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong northerly winds developed across southern sections of Santa Barbara county through the Santa Ynez Mountains. An automated sensor at Las Flores Canyon reported an extended period of sustained northerly winds between 41 and 46 MPH.

High Wind in SANTA BARBARA COUNTY MOUNTAINS, CALIFORNIA
From 29-DEC-10 16:30:00 to 30-DEC-10 06:00:00 (PST-8)
Magnitude: 40.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong northerly winds developed across southern sections of Santa Barbara county through the Santa Ynez Mountains. An automated sensor at Las Flores Canyon reported an extended period of sustained northerly winds between 41 and 46 MPH.

High Wind in SANTA CLARITA VALLEY, CALIFORNIA
From 30-DEC-10 00:57:00 to 30-DEC-10 01:57:00 (PST-8)
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Strong northerly winds developed across the Santa Clarita Valley. The RAWS sensor at Saugus reported north winds gusting between 58 and 61 MPH.

High Wind in ANTELOPE VALLEY, CALIFORNIA
From 29-DEC-10 19:14:00 to 29-DEC-10 22:14:00 (PST-8)
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong west to northwest winds developed across the Antelope Valley. An automated sensor near the intersection of Highway 14 and Avenue D reported westerly winds gusting to 66 MPH. A RAWS sensor at Poppy Park reported a wind gust of 61 MPH.

High Wind in LOS ANGELES COUNTY SAN FERNANDO VALLEY, CALIFORNIA
From 30-DEC-10 00:45:00 to 30-DEC-10 00:50:00 (PST-8)
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong northerly winds developed across the San Fernando Valley. A trained weather spotter in Van Nuys reported sustained north winds of 45 MPH with gusts to 60 MPH.

High Wind in LOS ANGELES COUNTY SAN GABRIEL VALLEY, CALIFORNIA
From 29-DEC-10 21:56:00 to 29-DEC-10 22:56:00 (PST-8)
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Strong northerly winds developed across the San Gabriel Valley. The RAWS sensor at San Rafael Hills reported north winds gusting to 61 MPH.

High Wind in SANTA MONICA MOUNTAINS RECREATION AREA, CALIFORNIA
From 29-DEC-10 17:00:00 to 29-DEC-10 20:00:00 (PST-8)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Strong northerly winds developed across the Santa Monica Mountains Recreational Area. At Laguna Peak, sustained north winds between 38 and 46 MPH were reported along with gusts between 58 and 62 MPH.

Winter Storm in LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE, CALIFORNIA
From 30-DEC-10 08:00:00 to 30-DEC-10 08:10:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Significant winter storm conditions developed across the mountains of Los Angeles County. Dangerous winter storm conditions were reported across the Interstate 5 corridor with a combination of snow and gusty north winds. Snowfall totals generally ranged between 3 and 7 inches. However, the northerly winds gusting in excess of 60 MPH generated near zero visibilities in blowing snow as well as dangerous wind chills below zero degrees. In fact, Interstate 5 was shut down due to the winter storm conditions.

Winter Storm in VENTURA COUNTY MOUNTAINS, CALIFORNIA
From 30-DEC-10 08:00:00 to 30-DEC-10 08:10:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Significant winter storm conditions developed across the mountains of Ventura County. Dangerous winter storm conditions were reported across the Interstate 5 corridor with a combination of snow and gusty north winds. Snowfall totals generally ranged between 3 and 7 inches. However, the northerly winds gusting in excess of 60 MPH generated near zero visibilities in blowing snow as well as dangerous wind chills below zero degrees. In fact, Interstate 5 was shut down due to the winter storm conditions.