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National Oceanic and Atmospheric Administration's photograph and image collection has over 10,000 downloadable images that are related to weather. To find images browse the index, or search the collection by keyword.
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This "general cloud reference", hosted by the Plymouth State College Weather Center, provides cloud classifications and descriptions, as well as photographs.
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Discusses how to interpret weather information in order to make predictions. Focuses on reading weather maps to make forecasts, and general methods of preparing a forecast.