Skywarn is an effort to save lives during severe weather emergencies by expanding networks of spotters and by encouraging the widest possible participation in tornado warning programs. Skywarn Weather Spotters provide a valuable service to the National Weather Service by reporting storm damage, precipitation and other observed weather phenomena. There is no way to stop tornadoes, and not all tornadoes show up on radar, but they can be seen. Lives can be saved. Only one instrument can detect a tornado or funnel with complete certainty--the human eye.