The Model for Prediction Across Scales – Atmosphere (MPAS-A) is next-generation numerical atmospheric model that employs state-of-the-art numerics and software engineering, while incorporating physical parameterization schemes from the WRF-ARW model. MPAS-A solves the compressible non-hydrostatic equations, supporting applications from global scales to the explicit simulation of clouds, and it uses horizontally unstructured meshes that permit continuous mesh refinement in both global and regional configurations. Leading scientists from the US National Center for Atmospheric Research (NSF-NCAR) will introduce you to MPAS-A and MPAS-JEDI.