Weather & Climate
Water in the Atmosphere
Air Masses are huge bodies of air that have similar temperature, humidity and air pressure. When two air masses meet they form a front.
Types of Fronts: Cold Front, Warm Front, Stationary Front, Occluded Front
Low- and High-Pressure Systems
Thunderstorms, Tornadoes, Hurricanes
Beginnings of a Hurricane
Desert dust blows off the west coast of Africa and over the Canary Islands in Nov. 2006.
Credit: The MODIS instrument on NASA's Terra satellite. [More]
Data: World Temperatures according to the Hadley Center for Climate Prediction