In September 2020, NSF announced a large national investment in multiple national AI institutes across the US. These institutes each focus on different foundational aspects of AI and many require extensive HPC to facilitate their research. Our institute, the NSF AI Institute for Research on Trustworthy AI in Weather, Climate, and Coastal Oceanography, is focused on creating trustworthy AI for a variety of applications in environmental science. In this talk, I will give a brief overview of our institute and then focus on how HPC is facilitating our work in creating trustworthy AI for weather applications.