In this study, we visualize the evolution of aerosol particles over Northern California using simulations from the WRF-PartMC model. We present two days of results, centering the numerical grid on the Bay Area with a horizontal resolution of 4-by-4-kilometers. Each grid cell contains approximately 5,000 computational particles to represent the aerosol. Much like snowflakes, aerosol particles exhibit immense diversity in size and chemical composition, continuously evolving as they travel through the atmosphere. Our particle-resolved simulation captures these processes with unprecedented detail, including the aerosol mixing state. This study is pioneering in its use of particle-resolved methods to simulate aerosols on a regional scale.