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- DictionaryWeath·er map/ˈweT͟Hər ˌmap/
noun
- 1. a map showing the state of the weather over a large area.
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noun
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A weather map, also known as synoptic weather chart, displays various meteorological features across a particular area at a particular point in time and has various symbols which all have specific meanings. Such maps have been in use since the mid-19th century and are used for research and weather forecasting purposes. Maps using isotherms show temperature gradients, which can help locate weather ... Wikipedia