THOR PC THOR PC is an interactive computer program designed to display and save lightning hazard data developed by THOR GUARD lightning prediction systems. When interconnected by way of a DB9 cable with THOR GUARD through a computer terminal, THOR PC may run "in background" until a preset warning level has been reached. At this time notification is displayed by a blinking icon and the user may then access their THOR PC program for more information. The system has been deigned to save THOR GUARD data and display it graphically at a later date. In this way the user will have a permanent record of the time, duration and intensity of the storm data. Saved data includes the Lightning Hazard Level (LHL), Dynamic Index (DI), Field Collapse Count (FCC), and real time event chronology. THOR PC may also be utilized as an excellent teaching tool to show energy migration during storm conditions. A comprehensive "Help" menu is instantly available to answer questions.