Atherton, CA Warnings, Watches and Advisories

Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.

Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Atherton.

Use the Radar Maps link provided to understand the trajectory of a storm.

Wind Advisory issued April 18 at 12:15PM PDT until April 18 at 8:00PM PDT by NWS Phoenix AZ

* WHAT...West winds 25 to 35 mph with gusts up to 50 mph. * WHERE...Southwest corner of Imperial County. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Difficult driving conditions, especially for larger vehicles traveling along roads with crosswinds.

Wind Advisory issued April 18 at 10:51AM PDT until April 18 at 11:00PM PDT by NWS Las Vegas NV

* WHAT...North winds 20 to 30 mph with gusts up to 45 mph expected. * WHERE...Death Valley National Park. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Gusty winds will blow around unsecured objects. A few power outages may occur.

Wind Advisory issued April 18 at 10:51AM PDT until April 18 at 11:00PM PDT by NWS Las Vegas NV

* WHAT...North winds 20 to 30 mph with gusts up to 45 mph expected. * WHERE...Owens Valley. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...The strongest winds will generally be between Independence and Bishop.

Air Quality Alert issued April 17 at 12:22PM PDT by NWS San Diego CA

* WHAT...The South Coast AQMD has extended an air quality alert due to harmful levels of particle pollution from windblown dust. * WHERE...in the Coachella Valley. Levels of particle pollution can vary by time and location depending on emissions and local weather conditions. * WHEN...until late Friday night. * IMPACTS... Particle pollution can get deep into the lungs and cause serious health problems such as asthma attacks, heart and lung disease symptoms, and increased risk of lung infections. Everyone can be affected, but sensitive groups such as people with lung or heart disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk.

Air Quality Alert issued April 17 at 7:50AM MST by NWS Phoenix AZ

* WHAT...The Imperial County APCD has issued an air quality alert due to harmful levels of particle pollution from windblown dust. * WHERE...Imperial County west. Levels of particle pollution can vary by time and location depending on emissions and local weather conditions. * WHEN...today through Friday, April 18, 2025. * IMPACTS... Particle pollution can get deep into the lungs and cause serious health problems such as asthma attacks, heart and lung disease symptoms, and increased risk of lung infections. Everyone can be affected, but sensitive groups such as people with lung or heart disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk.