Live National Weather Service alerts, NEXRAD weather radar, hourly forecast tied to the local NWS gridpoint (not a county-centroid approximation), 5-day outlook, river gauges, storm reports, and air quality for San Mateo, CA. San Mateo, CA has a population of approximately 103,536 (GeoNames cities500 dataset, can lag the most-recent Census ACS by 5+ years). Located in San Mateo County, CA. Free, no login, no ads.
San Mateo, CA sits at approximately 37.563°N, 122.326°W. BloomWX pulls live data from the National Weather Service, USGS Water Data, and the Storm Prediction Center — every signal a SKYWARN spotter, emergency manager, or anyone planning around the weather needs. See all California weather dashboards on BloomWX.
BloomWX is a free weather operations dashboard. Data refreshes every 60 seconds and comes directly from weather.gov, USGS, and other federal sources — no third-party API middlemen, no consumer-app cruft. Read the BloomWX learn library for beginner-friendly explainers on every dashboard surface.