Abstract
The practically global extent of World War II created a need for world weather information more pronounced than in any former period. Insufficient knowledge of weather in remote places, inadequate data on diverse weather elements, and lack of information about conditions extending into the stratosphere, led to the initiation of many projects involving the plotting, analyzing, and drawing of thousands of weather maps and charts. This material proved to be valuable in providing guides to characteristic weather patterns which many meteorologists used in making difficult forecasts for military and transport operations in unfamiliar regions.
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