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 Mercer County, NJ (FIPS 34021) in New Jersey. Free, no login, no ads.
Mercer County, NJ is one of the counties of New Jersey covered by BloomWX. Mercer County, NJ has a population of approximately 383,732 (2022 estimate, US Census Bureau). The county covers 224.5 square miles of land area.
Trenton, Ewing, Princeton, Mercerville-Hamilton Square, Mercerville.
Mercer County, NJ is served by the National Weather Service PHI 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: Hunterdon County, NJ, Somerset County, NJ, Bucks County, PA, Burlington County, NJ, Middlesex County, NJ, Monmouth County, NJ.
BloomWX is a free weather operations dashboard for SKYWARN storm spotters, emergency management volunteers, ham radio nets, and anyone in Mercer County, NJ 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 New Jersey county weather dashboards on BloomWX.