Yosemite National Park, California
Regional Weather Alerts
| Alert: | Coastal Flood Advisory |
| Area(s): | Northern Humboldt Coast |
| Effective: | 2025-12-05 @ 9:15 pm -> 2025-12-06 @ 3:00 pm |
| Onset: | 2025-12-06 @ 12:00 pm -> 2025-12-06 @ 6:15 am |
| Severity: | Minor |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Eureka CA on 2025-12-05 @ 9:15 pm |
| Headline: | Coastal Flood Advisory issued December 5 at 7:15PM PST until December 6 at 1:00PM PST by NWS Eureka CA |
| Description: |
* WHAT...High astronomical tides will cause minor flooding in low lying areas around Humboldt Bay. Up to one half foot of saltwater inundation above ground level is possible near shorelines and tidal waterways. Between 8.9 and 9.2 feet MLLW at the North Spit tide gauge is predicted. * WHERE...Northern Humboldt Coast County. * WHEN...From 10 AM to 1 PM PST Saturday. High tide is at 11:44 AM at the Humboldt Bay North Spit tide gauge. Saltwater inundation will be possible 1 to 2 hours before and after high tide. * IMPACTS...Flooding of low lying areas around Humboldt Bay including parks and roads with only isolated closures expected. Flooding will likely impact Jackson Ranch Road in the Arcata Bottoms and several roads in King Salmon. |
| Alert: | Dense Fog Advisory |
| Area(s): | West Side Mountains north of 198 |
| Effective: | 2025-12-05 @ 8:45 pm -> 2025-12-06 @ 2:00 pm |
| Onset: | 2025-12-05 @ 8:45 pm -> 2025-12-06 @ 6:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Hanford CA on 2025-12-05 @ 8:45 pm |
| Headline: | Dense Fog Advisory issued December 5 at 6:45PM PST until December 6 at 12:00PM PST by NWS Hanford CA |
| Description: |
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...West Side Mountains north of 198. This includes Highway 152 through Pacheco Pass. * WHEN...Until noon PST Saturday. * IMPACTS...Low visibility could make driving conditions hazardous. |
| Alert: | Dense Fog Advisory |
| Area(s): | Grapevine |
| Effective: | 2025-12-05 @ 8:45 pm -> 2025-12-06 @ 2:00 pm |
| Onset: | 2025-12-05 @ 8:45 pm -> 2025-12-06 @ 6:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Hanford CA on 2025-12-05 @ 8:45 pm |
| Headline: | Dense Fog Advisory issued December 5 at 6:45PM PST until December 6 at 12:00PM PST by NWS Hanford CA |
| Description: |
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Grapevine, mainly along Interstate 5 in Kern County. * WHEN...Until noon 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: | 2025-12-05 @ 2:51 pm |
| Onset: | 2025-12-05 @ 2:51 pm -> 2025-12-07 @ 2:00 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS San Diego CA on 2025-12-05 @ 2:51 pm |
| Headline: | Air Quality Alert issued December 5 at 12:51PM 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...from midnight tonight to midnight on 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: | Coastal Flood Advisory |
| Area(s): | San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast |
| Effective: | 2025-12-05 @ 2:49 pm -> 2025-12-07 @ 5:00 pm |
| Onset: | 2025-12-05 @ 2:49 pm -> 2025-12-06 @ 7:00 am |
| Severity: | Minor |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS San Francisco CA on 2025-12-05 @ 2:49 pm |
| Headline: | Coastal Flood Advisory issued December 5 at 12:49PM PST until December 7 at 3:00PM PST by NWS San Francisco CA |
| Description: |
* WHAT...Up to 1.7 ft of inundation above ground level is possible in low lying areas near shorelines and tidal waterways. * WHERE...Bayshore locations along San Francisco and Monterey Bay. * WHEN...Until 3 PM PST Sunday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...The San Francisco tidal gauge high tide is expected to be 1.7 ft above normal (7.51 ft MLLW) at 11:25 AM Saturday and 0.9 ft above normal (6.75 ft MLLW) at 12:17 PM Sunday. High tide timing varies up to 90 minutes earlier or later along the Pacific Coast and throughout the San Francisco Bay respectively. |
| Alert: | Beach Hazards Statement |
| Area(s): | Catalina and Santa Barbara Islands; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Ventura County Beaches; Malibu Coast; Los Angeles County Beaches |
| Effective: | 2025-12-05 @ 2:37 pm -> 2025-12-06 @ 1:00 pm |
| Onset: | 2025-12-05 @ 2:37 pm -> 2025-12-06 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Los Angeles/Oxnard CA on 2025-12-05 @ 2:37 pm |
| Headline: | Beach Hazards Statement issued December 5 at 12:37PM PST until December 6 at 11:00AM PST by NWS Los Angeles/Oxnard CA |
| Description: |
* WHAT...Tidal overflow will flood some normally dry beach areas. * WHERE...Catalina and Santa Barbara Islands, Santa Barbara County Southwestern Coast, Santa Barbara County Southeastern Coast, Ventura County Beaches, Malibu Coast and Los Angeles County Beaches. * WHEN...Through Saturday morning. * IMPACTS...Pooling of sea water is possible around high tide at beach and harbor areas that is uncommon with normal tidal ranges. Enhanced beach erosion is also possible. No significant damage is expected. * ADDITIONAL DETAILS...High tides of 7.2 to 7.6 feet will occur between 8 and 10 am each morning. |
| 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: | 2025-12-05 @ 2:33 pm |
| Onset: | 2025-12-05 @ 2:33 pm -> 2025-12-07 @ 2:00 am |
| Severity: | Unknown |
| Certainty: | Unknown |
| Urgency: | Unknown |
| Issued By: | NWS Los Angeles/Oxnard CA on 2025-12-05 @ 2:33 pm |
| Headline: | Air Quality Alert issued December 5 at 12:33PM 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...from midnight to midnight on Saturday. * 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. |