Live National Weather Service alerts, NEXRAD weather radar, USGS river and stream gauges, Storm Prediction Center convective outlooks, Local Storm Reports, 5-day forecast, air quality, and severe-weather notifications for San Mateo County, CA (FIPS 06081) in California. Free, no login, no ads.
San Mateo County, CA is one of the counties of California covered by BloomWX. San Mateo County, CA has a population of approximately 754,250 (2022 estimate, US Census Bureau). The county covers 448.6 square miles of land area. The county seat is Redwood City.
Daly City, San Mateo, Redwood City, South San Francisco, San Bruno.
San Mateo County, CA is served by the National Weather Service MTR forecast office for warnings, watches, advisories, and decision-support services. The same office produces the Hazardous Weather Outlook, Area Forecast Discussion, and DSS briefing packets you'll see on the BloomWX dashboard for this county.
BloomWX also covers the surrounding counties: San Francisco County, CA, Santa Cruz County, CA, Alameda County, CA, Santa Clara County, CA.
BloomWX is a free weather operations dashboard for SKYWARN storm spotters, emergency management volunteers, ham radio nets, and anyone in San Mateo County, CA who needs the official NWS data without the consumer-app cruft. Data is pulled directly from weather.gov and refreshes every 60 seconds. Sources: National Weather Service, Storm Prediction Center, USGS Water Data, NOAA Space Weather Prediction Center, Open-Meteo (Air Quality), and the Citizen Weather Observer Program.
Read the BloomWX learn library for beginner-friendly explainers on every dashboard surface, including SPC convective outlooks (TSTM/MRGL/SLGT/ENH/MDT/HIGH), NEXRAD radar, USGS flood gauges, and WPC surface analysis charts. See all California county weather dashboards on BloomWX.