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 Allegheny County, PA (FIPS 42003) in Pennsylvania. Free, no login, no ads.
Allegheny County, PA is one of the counties of Pennsylvania covered by BloomWX. Allegheny County, PA has a population of approximately 1,245,310 (2022 estimate, US Census Bureau). The county covers 730 square miles of land area. The county seat is Pittsburgh.
Pittsburgh, Mount Lebanon, Bethel Park, Monroeville, Plum.
Allegheny County, PA is served by the National Weather Service PBZ 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: Armstrong County, PA, Westmoreland County, PA, Butler County, PA, Washington County, PA, Beaver County, PA.
BloomWX is a free weather operations dashboard for SKYWARN storm spotters, emergency management volunteers, ham radio nets, and anyone in Allegheny County, PA 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 Pennsylvania county weather dashboards on BloomWX.