Los Angeles, California
Regional Weather Alerts
| Alert: | Dense Fog Advisory |
| Area(s): | San Diego County Coastal Areas; Orange County Coastal |
| Effective: | 2025-12-12 @ 3:20 pm -> 2025-12-13 @ 12:00 pm |
| Onset: | 2025-12-12 @ 3:20 pm -> 2025-12-13 @ 12:15 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS San Diego CA on 2025-12-12 @ 3:20 pm |
| Headline: | Dense Fog Advisory issued December 12 at 1:20PM PST until December 13 at 10:00AM PST by NWS San Diego CA |
| Description: |
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Orange County Coastal Areas and San Diego County Coastal Areas. * WHEN...Until 10 AM PST Saturday. * IMPACTS...Low visibility could make driving conditions hazardous. |
| Alert: | Air Quality Alert |
| Area(s): | Calabasas and Agoura Hills; Catalina and Santa Barbara Islands; Eastern San Fernando Valley; Eastern Santa Monica Mountains Recreational Area; Los Angeles County Beaches; Los Angeles County Inland Coast including Downtown Los Angeles; Los Angeles County San Gabriel Valley; Malibu Coast; Palos Verdes Hills; Santa Clarita Valley; Santa Susana Mountains; Western San Fernando Valley; Western Santa Monica Mountains Recreational Area |
| Effective: | 2025-12-12 @ 2:45 pm |
| Onset: | 2025-12-12 @ 2:45 pm -> 2025-12-14 @ 2:00 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Los Angeles/Oxnard CA on 2025-12-12 @ 2:45 pm |
| Headline: | Air Quality Alert issued December 12 at 12:45PM PST by NWS Los Angeles/Oxnard CA |
| Description: |
* WHAT...The South Coast AQMD has issued a mandatory wood-burning ban for residents in the South Coast Air Basin. The No-Burn rule bans burning wood, pellets, and manufactured fire logs in any indoor or outdoor wood-burning device. * WHERE...The South Coast Air Basin, which includes Orange County and non-desert portions of Los Angeles, Riverside, and San Bernardino counties. No-Burn Day alerts do not apply to areas above 3,000 feet in elevation, the Coachella Valley, or the High Desert. Homes that rely on wood as a sole source of heat, low-income households and those without natural gas service also are exempt from the requirement. * WHEN...Midnight to midnight. * IMPACTS...Particles in smoke can get deep into the lungs and cause health problems (including asthma attacks), increases in emergency room visits, and hospitalizations. No-Burn Days are needed to protect public health when fine particle pollution levels are expected to be high anywhere in the South Coast Air Basin. No-Burn Days are based on fine particle pollution levels that are forecasted for an entire 24-hour period, which may not be reflected in real-time air quality maps. |
| Alert: | Dense Fog Advisory |
| Area(s): | San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Ventura County Beaches; Malibu Coast; Los Angeles County Beaches |
| Effective: | 2025-12-12 @ 2:29 pm -> 2025-12-13 @ 12:00 pm |
| Onset: | 2025-12-12 @ 2:29 pm -> 2025-12-13 @ 12:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Los Angeles/Oxnard CA on 2025-12-12 @ 2:29 pm |
| Headline: | Dense Fog Advisory issued December 12 at 12:29PM PST until December 13 at 10:00AM PST by NWS Los Angeles/Oxnard CA |
| Description: |
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...All the beach areas of Los Angeles, Ventura, Santa Barbara, and San Luis Obispo Counties. * WHEN...Until 10 AM PST Saturday. * IMPACTS...Low visibility could make driving conditions hazardous. |
| Alert: | Air Quality Alert |
| Area(s): | San Bernardino and Riverside County Valleys-The Inland Empire; Riverside County Mountains; Santa Ana Mountains and Foothills; San Gorgonio Pass Near Banning; Orange County Coastal; Orange County Inland |
| Effective: | 2025-12-12 @ 1:54 pm |
| Onset: | 2025-12-12 @ 1:54 pm -> 2025-12-14 @ 2:00 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS San Diego CA on 2025-12-12 @ 1:54 pm |
| Headline: | Air Quality Alert issued December 12 at 11:54AM PST by NWS San Diego CA |
| Description: |
* WHAT...The South Coast AQMD has issued a mandatory wood-burning ban for residents in the South Coast Air Basin. The No-Burn rule bans burning wood, pellets, and manufactured fire logs in any indoor or outdoor wood-burning device. * WHERE...The South Coast Air Basin, which includes Orange County and non-desert portions of Los Angeles, Riverside, and San Bernardino counties. No-Burn Day alerts do not apply to areas above 3,000 feet in elevation, the Coachella Valley, or the High Desert. Homes that rely on wood as a sole source of heat, low-income households and those without natural gas service also are exempt from the requirement. * WHEN...Midnight tonight to midnight Saturday night. * IMPACTS...Particles in smoke can get deep into the lungs and cause health problems (including asthma attacks), increases in emergency room visits, and hospitalizations. No-Burn Days are needed to protect public health when fine particle pollution levels are expected to be high anywhere in the South Coast Air Basin. No-Burn Days are based on fine particle pollution levels that are forecasted for an entire 24-hour period, which may not be reflected in real-time air quality maps. |
| Alert: | Dense Fog Advisory |
| Area(s): | West Side Mountains north of 198; Coalinga - Avenal; West Side Mountains South of 198; Buena Vista; South End San Joaquin Valley; Mariposa Madera Foothills; Mariposa-Madera Lower Sierra; Fresno-Tulare Foothills; Fresno-Tulare Lower Sierra; South End Sierra Foothills; South End of the Lower Sierra; Tehachapi; Grapevine; Frazier Mountain Communities |
| Effective: | 2025-12-12 @ 12:56 pm -> 2025-12-13 @ 1:00 pm |
| Onset: | 2025-12-12 @ 12:56 pm -> 2025-12-12 @ 9:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Hanford CA on 2025-12-12 @ 12:56 pm |
| Headline: | Dense Fog Advisory issued December 12 at 10:56AM PST until December 13 at 11:00AM PST by NWS Hanford CA |
| Description: |
* WHAT...Visibility one quarter mile or less in dense fog for elevations between 1,000 and 2,500 feet. * WHERE...A portion of central California. * WHEN...Until 11 AM PST Saturday. * IMPACTS...Sudden encounter of low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Mountain Highways included but not limited to: 41, 58, 152, 168, 198 and Interstate 5. With little change in conditions, the dense fog will remain all day. |
| Alert: | Beach Hazards Statement |
| Area(s): | 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: | 2025-12-12 @ 6:45 am -> 2025-12-13 @ 12:00 am |
| Onset: | 2025-12-12 @ 6:45 am -> 2025-12-13 @ 12:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS San Francisco CA on 2025-12-12 @ 6:45 am |
| Headline: | Beach Hazards Statement issued December 12 at 4:45AM PST until December 12 at 10:00PM PST by NWS San Francisco CA |
| Description: |
* WHAT...Long period northwesterly swell will result in strong rip currents, sneaker waves, and breaking waves of 12 to 16 feet. * WHERE...Beaches along the Pacific Coast. * WHEN...Through Friday evening. * IMPACTS...Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. Rip currents are typically stronger in the vicinity of jetties, inlets, and piers. |