The HYSPLIT model can be run interactively on the READY web site or installed on a PC (Mac) or LINUX workstation and run using a graphical user interface (GUI) or script. Got a question about HYSPLIT? Ask your question through the HYSPLIT Forum. HYSPLIT-WEB (Internet-based) Run HYSPLIT Trajectory Model (No registration required) Run HYSPLIT Dispersion Model (includes volcanic ash) HYSPLIT Registra