Understanding the chemistry in western wildfire smoke has major ramifications for air quality, nutrient cycles, weather, and climate. Burn conditions combined with the first day of processing are major drivers of the eventual air quality and climate significance of wildfire smoke. Understanding all the processes requires the skillful interpretation of a wide suite of observations and the 2.5 day workshop at the NCAR will bring these collaborators together. The ultimate goal is to improve our fundamental understanding of the emissions of western U.S. wildfires and their chemical evolution in the atmosphere.