Students share weather data and interpretations with other students on the Internet. The Earth Observing System Educators' Visual Materials - This site is predominately good for teacher background. Tornadoes by 5th grade students - 44. Typhoons by 5th grade students - 45. Severe Storms - facts, warnings and protection.
Site is from Australia.
Good pictures and drawings in section 2. More Links - 47. Downburst - A strong downdraft resulting in an outward burst of damaging winds on or near the ground. Downburst winds can produce damage similar to a strong tornado. Although usually associated with thunderstorms, downbursts can occur with showers too weak to produce thunder.