A powerful late season winter storm brought gusty winds, heavy snow and flash flooding to Southwestern California. Across the area, rainfall amounts were very significant, ranging from 3-7.5 inches across coastal and valley areas to 5-10 inches across the foothills and mountains. This heavy rainfall produced a couple reports of flash flooding. Cold air, associated with the storm, producing low snow levels. Snowfall totals in the mountains ranged between 1 and 4 feet. Gusty south to southwest were reported with some spots experiencing very strong wind gusts in excess of 70 MPH.

Winter Storm in LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE, CALIFORNIA
From 20-MAR-11 15:00:00 to 21-MAR-11 11:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snowfall fell across the mountains of Los Angeles county. Elevations above 4500 feet received between 1 and 4 feet of snow with the highest amounts at the resort level. The heavy snow, combined with gusty southerly winds, produced hazardous winter storm conditions.

Winter Storm in VENTURA COUNTY MOUNTAINS, CALIFORNIA
From 20-MAR-11 15:00:00 to 21-MAR-11 11:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snowfall fell across the mountains of Ventura county. Elevations above 4500 feet received between 1 and 4 feet of snow. The heavy snow, combined with gusty southerly winds, produced hazardous winter storm conditions.

Winter Storm in SANTA BARBARA COUNTY MOUNTAINS, CALIFORNIA
From 20-MAR-11 15:00:00 to 21-MAR-11 11:00:00 (PST-8)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snowfall fell across the mountains of Santa Barbara county. Elevations above 3500 feet received between 6 and 12 inches of snow. The heavy snow, combined with gusty southerly winds, produced hazardous winter storm conditions.

Flash Flood in SANTA BARBARA, CALIFORNIA
From 20-MAR-11 09:19:00 to 20-MAR-11 12:00:00 (PST-8)
Location: EL ENCANTO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported flash flooding across Paradise Road. Several vehicles were stuck in water up to their windshields.

Flash Flood in LOS ANGELES, CALIFORNIA
From 20-MAR-11 17:14:00 to 20-MAR-11 19:30:00 (PST-8)
Location: TOPANGA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

California Highway Patrol reported flash flooding in the Woodland Hills area. The heavy rain produced a significant mud and debris flow down the road. Five cars were stuck in the mud and one car was swept away. No injuries were reported.

High Wind in SANTA BARBARA COUNTY CENTRAL COAST, CALIFORNIA
From 20-MAR-11 01:16:00 to 20-MAR-11 04:00:00 (PST-8)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong southerly winds developed across the west coast of Santa Barbara county. A wind tower at Vandenberg Air Force Base reported a southerly wind gusts of 60 MPH at 385 feet elevation.

High Wind in SANTA YNEZ VALLEY, CALIFORNIA
From 20-MAR-11 05:27:00 to 20-MAR-11 06:27:00 (PST-8)
Magnitude: 35.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong southerly winds developed across the Santa Ynez Valley. The Santa Ynez Airport reported sustained winds of 40 MPH.

High Wind in SANTA BARBARA COUNTY SOUTH COAST, CALIFORNIA
From 20-MAR-11 06:18:00 to 20-MAR-11 09:00:00 (PST-8)
Magnitude: 36.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong southerly winds developed across the south coast of Santa Barbara county. The RAWS sensor at Las Flores Canyon reported sustained winds of 41 MPH.

High Wind in ANTELOPE VALLEY, CALIFORNIA
From 20-MAR-11 06:55:00 to 20-MAR-11 13:59:00 (PST-8)
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

A strong mountain wave developed across the Antelope Valley, producing very strong southwesterly winds. The sensor at Valyermo reported wind gusts between 59 and 77 MPH. The RAWS sensor at Lake Palmdale reported wind gusts between 58 and 63 MPH.

High Wind in SANTA MONICA MOUNTAINS RECREATION AREA, CALIFORNIA
From 20-MAR-11 12:50:00 to 20-MAR-11 13:50:00 (PST-8)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong southerly winds developed across the Santa Monica Mountains. A weather spotter in Malibu reported a wind gust of 60 MPH.