Nimbus TT - Nimbus is a freeware font of weather map symbols. Designed for teachers, students, and amateur meteorologists, it comes to you from the Center for Mathematics and Science Education, University of North Carolina at Chapel Hill. Nimbus contains more than 140 meteorological symbols. It can be used in several ways. Weather enthusiasts will find in Nimbus all the symbols approved under international convention for weather conditions, cloud types, etc. At the same time, teachers and students will find a smaller set of more generic symbols placed conveniently on the unshifted letter and number keys.