University Corporation for Atmospheric Research
Ucar: Clouds Images
Photos of various types of clouds and diagrams to help you understand clouds.
University of Illinois
University of Illinois Urbana Champaign: Cloudsand Precipitation
Find out about the development of clouds, types of clouds, and precipitation. Includes diagrams and illustrations.
ClassFlow
Class Flow: Frontal Depressions
[Free Registration/Login Required] A flipchart showing the separate stages of a frontal depression with reference to the weather charts that plot them, diagrams of the air masses that are moved around in them, and also of the cloud...