U.S. Air Quality

Cloudy, moderate conditions.. it's winter..

Cloudy in much of the U.S. today, with a mix of good and moderate fine particle concentrations. Poorer air quality continued in the very cloud-covered Pacific Northwest, improving somewhat as the day progressed. Perhaps a little foggy haze in the southwest U.S.

With nothing too dramatic going on in any specific location, here's the national view of the fine particle concentrations from AIRNow (left) and the satellite true color view from MODIS Terra (right).