Observed air quality and the smoke outlook for Mercersburg, PA: when smoke arrives, how bad it gets, when it clears — with the fires nearby and a live local map. Forecasts from NOAA, NASA, and ECCC models, checked hourly against real monitors and satellites.
Nearby: McConnellsburg, PA smoke forecast (8.8 mi NW) · Greencastle, PA smoke forecast (9.7 mi E) · Marion, PA smoke forecast (11 mi E) · Hagerstown, MD smoke forecast (16 mi SE) · Baltimore, MD smoke forecast (78 mi SE) · Washington, DC smoke forecast (79 mi SE)