No dataset is directly uploaded to ScienceHub. The data are permanently available from the corresponding author. This dataset is not publicly accessible because: The data generated solely by the external academic team and were not shared in raw form with EPA. EPA reviewed the final figures, experimental methodology, model configuration and assumptions, and conclusions of the paper for accuracy, precision, and scientific relevance. It can be accessed through the following means: The data are, as indicated in the publication, available freely upon request from the corresponding author, a professor currently of the Department of Civil and Environmental Engineering at Northeastern University in Boston. According to the publication emails may be sent to: Yang Zhang (ya.zhang@northeastern.edu). Format: The data are comprised of model outputs from the weather forecasting model FV3 and the air quality model CMAQ, as well as measurement data for meteorological metrics and air pollution observations.

The data are presented in a number of tables, maps, scatterplots and bar plots.

This dataset is associated with the following publication: Chen, X., Y. Zhang, K. Wang, D. Tong, P. Lee, Y. Tang, J. Huang, P. Campbell, J. McQueen, H. Pye, B. Murphy, and D. Kang. Evaluation of the offline-coupled GFSv15–FV3–CMAQv5.0.2 in support of the next-generation National Air Quality Forecast Capability over the contiguous United States. Geoscientific Model Development. Copernicus Publications, Katlenburg-Lindau, GERMANY, 14: 3969–3993, (2021).