El Dorado County

WINTER WEATHER ADVISORY   (2 updates) Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area Effective: Dec 22 12:50 pm Expired: Dec 23 3:15 pm Duration: 1 day   2 hrs   25 mins   Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins

Placer County

WINTER WEATHER ADVISORY   (2 updates) Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area Effective: Dec 22 12:50 pm Expired: Dec 23 3:15 pm Duration: 1 day   2 hrs   25 mins   Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins

Nevada County

WINTER WEATHER ADVISORY   (2 updates) Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area Effective: Dec 22 12:50 pm Expired: Dec 23 3:15 pm Duration: 1 day   2 hrs   25 mins   Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins

Alpine County

WINTER WEATHER ADVISORY   (2 updates) Areas affected: Greater Lake Tahoe Area; Greater Lake Tahoe Area Effective: Dec 22 12:50 pm Expired: Dec 23 3:15 pm Duration: 1 day   2 hrs   25 mins   Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins

W. Slope N. Sierra

WINTER WEATHER ADVISORY   Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins

Plumas County

WINTER WEATHER ADVISORY   (2 updates) Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins   Areas affected: Lassen-Eastern Plumas-Eastern Sierra Counties Effective: Dec 22 12:50 pm Expired: Dec 23 3:15 pm Duration: 1 day   2 hrs   25 mins

Amador County

WINTER WEATHER ADVISORY   Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins

Butte County

WINTER WEATHER ADVISORY   Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins

Calaveras County

WINTER WEATHER ADVISORY   Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins

Lassen County

WINTER WEATHER ADVISORY   (2 updates) Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins   Areas affected: Lassen-Eastern Plumas-Eastern Sierra Counties Effective: Dec 22 12:50 pm Expired: Dec 23 3:15 pm Duration: 1 day   2 hrs   25 mins

Shasta County

WINTER WEATHER ADVISORY   Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins

Sierra County

WINTER WEATHER ADVISORY   (2 updates) Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins   Areas affected: Lassen-Eastern Plumas-Eastern Sierra Counties Effective: Dec 22 12:50 pm Expired: Dec 23 3:15 pm Duration: 1 day   2 hrs   25 mins

Tehama County

WINTER WEATHER ADVISORY   Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins

Tuolumne County

WINTER WEATHER ADVISORY   (2 updates) Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins   Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP Effective: Dec 22 7:38 pm Expired: Dec 23 4:00 am Duration: 8 hrs   22 mins

Yuba County

WINTER WEATHER ADVISORY   Areas affected: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada Effective: Dec 22 11:58 am Expired: Dec 23 6:00 am Duration: 18 hrs   02 mins

Del Norte County   2 alerts

WIND ADVISORY   Areas affected: Coastal Del Norte; Del Norte Interior; Southwestern Humboldt; Northern Humboldt Interior; Southern Humboldt Interior Effective: Dec 22 10:19 pm Expired: Dec 23 6:30 am Duration: 8 hrs   11 mins

HIGH SURF WARNING   Areas affected: Coastal Del Norte; Northern Humboldt Coast; Southwestern Humboldt; Mendocino Coast Effective: Dec 22 3:35 pm Expired: Dec 23 3:00 am Duration: 11 hrs   25 mins

Humboldt County   2 alerts

WIND ADVISORY   Areas affected: Coastal Del Norte; Del Norte Interior; Southwestern Humboldt; Northern Humboldt Interior; Southern Humboldt Interior Effective: Dec 22 10:19 pm Expired: Dec 23 6:30 am Duration: 8 hrs   11 mins

HIGH SURF WARNING   Areas affected: Coastal Del Norte; Northern Humboldt Coast; Southwestern Humboldt; Mendocino Coast Effective: Dec 22 3:35 pm Expired: Dec 23 3:00 am Duration: 11 hrs   25 mins

Mendocino County

HIGH SURF WARNING   Areas affected: Coastal Del Norte; Northern Humboldt Coast; Southwestern Humboldt; Mendocino Coast Effective: Dec 22 3:35 pm Expired: Dec 23 3:00 am Duration: 11 hrs   25 mins

Fresno County

WINTER WEATHER ADVISORY   Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP Effective: Dec 22 7:38 pm Expired: Dec 23 4:00 am Duration: 8 hrs   22 mins

Madera County

WINTER WEATHER ADVISORY   Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP Effective: Dec 22 7:38 pm Expired: Dec 23 4:00 am Duration: 8 hrs   22 mins

Mariposa County

WINTER WEATHER ADVISORY   Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP Effective: Dec 22 7:38 pm Expired: Dec 23 4:00 am Duration: 8 hrs   22 mins

Tulare County

WINTER WEATHER ADVISORY   Areas affected: Yosemite NP outside of the valley; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP Effective: Dec 22 7:38 pm Expired: Dec 23 4:00 am Duration: 8 hrs   22 mins

Los Angeles County   2 alerts

HIGH SURF WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

COASTAL FLOOD WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

Marin County   2 alerts

HIGH SURF WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

COASTAL FLOOD WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

Monterey County   2 alerts

HIGH SURF WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

COASTAL FLOOD WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

San Francisco County   2 alerts

HIGH SURF WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

COASTAL FLOOD WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

San Mateo County   2 alerts

HIGH SURF WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

COASTAL FLOOD WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

Santa Cruz County   2 alerts

HIGH SURF WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

COASTAL FLOOD WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

Sonoma County   2 alerts

HIGH SURF WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

COASTAL FLOOD WARNING   Areas affected: San Francisco; Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast Effective: Dec 22 6:15 pm Expired: Dec 23 5:00 am Duration: 10 hrs   45 mins

Modoc County

WIND ADVISORY   Areas affected: Modoc County; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County Effective: Dec 22 7:14 pm Expired: Dec 23 7:15 am Duration: 12 hrs   01 min

Mono County

WINTER WEATHER ADVISORY   Areas affected: Mono Effective: Dec 22 12:50 pm Expired: Dec 23 3:15 pm Duration: 1 day   2 hrs   25 mins

Orange County   2 alerts

HIGH SURF ADVISORY   (2 updates) Areas affected: San Diego County Coastal Areas; Orange County Coastal Effective: Dec 22 9:34 pm Expired: Dec 23 6:00 am Duration: 8 hrs   26 mins   Areas affected: San Diego County Coastal Areas; Orange County Coastal Effective: Dec 23 12:46 am Expired: Dec 23 3:15 pm Duration: 14 hrs   29 mins

AIR QUALITY ALERT   Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire; Riverside County Mountains; San Gorgonio Pass Near Banning; Orange County Coastal; Orange County Inland Effective: Dec 22 12:13 pm Expired: Dec 24 12:00 am Duration: 1 day   11 hrs   47 mins

San Diego County

HIGH SURF ADVISORY   (2 updates) Areas affected: San Diego County Coastal Areas; Orange County Coastal Effective: Dec 22 9:34 pm Expired: Dec 23 6:00 am Duration: 8 hrs   26 mins   Areas affected: San Diego County Coastal Areas; Orange County Coastal Effective: Dec 23 12:46 am Expired: Dec 23 3:15 pm Duration: 14 hrs   29 mins

Riverside County

AIR QUALITY ALERT   Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire; Riverside County Mountains; San Gorgonio Pass Near Banning; Orange County Coastal; Orange County Inland Effective: Dec 22 12:13 pm Expired: Dec 24 12:00 am Duration: 1 day   11 hrs   47 mins

San Bernardino County   2 alerts

AIR QUALITY ALERT   Areas affected: San Bernardino and Riverside County Valleys-The Inland Empire; Riverside County Mountains; San Gorgonio Pass Near Banning; Orange County Coastal; Orange County Inland Effective: Dec 22 12:13 pm Expired: Dec 24 12:00 am Duration: 1 day   11 hrs   47 mins

WIND ADVISORY   (2 updates) Areas affected: Western Mojave Desert; Morongo Basin Effective: Dec 23 12:28 am Expired: Dec 23 2:00 pm Duration: 13 hrs   32 mins   Areas affected: Western Mojave Desert; Morongo Basin Effective: Dec 23 12:39 am Expired: Dec 23 2:00 pm Duration: 13 hrs   21 mins

San Luis Obispo County   2 alerts

COASTAL FLOOD ADVISORY   Areas affected: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches Effective: Dec 22 7:27 pm Expired: Dec 23 4:30 am Duration: 9 hrs   03 mins

HIGH SURF WARNING   Areas affected: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches Effective: Dec 22 7:27 pm Expired: Dec 23 4:30 am Duration: 9 hrs   03 mins

Santa Barbara County   3 alerts

COASTAL FLOOD ADVISORY   Areas affected: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches Effective: Dec 22 7:27 pm Expired: Dec 23 4:30 am Duration: 9 hrs   03 mins

HIGH SURF WARNING   Areas affected: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches Effective: Dec 22 7:27 pm Expired: Dec 23 4:30 am Duration: 9 hrs   03 mins

HIGH SURF ADVISORY   Areas affected: Catalina and Santa Barbara Islands; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Malibu Coast; Los Angeles County Beaches Effective: Dec 22 7:27 pm Expired: Dec 23 4:30 am Duration: 9 hrs   03 mins

Siskiyou County

HIGH WIND WARNING   Areas affected: Central Siskiyou County Effective: Dec 22 7:14 pm Expired: Dec 23 7:15 am Duration: 12 hrs   01 min

Ventura County   3 alerts

HIGH SURF WARNING   Areas affected: Ventura County Beaches Effective: Dec 22 7:27 pm Expired: Dec 23 4:30 am Duration: 9 hrs   03 mins

COASTAL FLOOD ADVISORY   Areas affected: Ventura County Beaches Effective: Dec 22 7:27 pm Expired: Dec 23 4:30 am Duration: 9 hrs   03 mins

AIR QUALITY ALERT   Areas affected: Catalina and Santa Barbara Islands; Santa Clarita Valley; Malibu Coast; Los Angeles County Beaches; Palos Verdes Hills; Los Angeles County Inland Coast including Downtown Los Angeles; Western Santa Monica Mountains Recreational Area; Eastern Santa Monica Mountains Recreational Area; Calabasas and Agoura Hills; Western San Fernando Valley; Eastern San Fernando Valley; Santa Susana Mountains; Los Angeles County San Gabriel Valley Effective: Dec 22 12:10 pm Expired: Dec 24 12:00 am Duration: 1 day   11 hrs   50 mins

Inyo County

WIND ADVISORY   Areas affected: Owens Valley; Death Valley National Park; Esmeralda and Central Nye County; Western Clark and Southern Nye County Effective: Dec 23 12:39 am Expired: Dec 23 2:00 pm Duration: 13 hrs   21 mins