Satellite measurements of air quality in the Pacific Northwest are compared to results from the AIRPACT-3 regional air quality forecast system which utilizes the MM5/SMOKE/CMAW modeling suite. Measurements such as tropospheric NO2 and Aerosol Optical Depth made by OMI (Ozone Monitoring Instrument) as well as CO from MOPITT (Measurements of Pollution in the Troposphere) are used as a basis for evaluation of the AIRPACT-3 emission inventory in urban areas. Individual days, monthly averages, and seasonal averages are presented in an effort to distinguish quantifiable discrepancies in the AIRPACT-3 emissions rates. Quantifiable trends in differences between AIRPACT and satellite measurements are used to update the model. Ongoing work with pollution from wildfires and the treatment of wildfire emissions in the modeling system are also discussed.