synoptic chart

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  • Maritime History
  • Meteorology and Climatology


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A weather chart on which the isobars derived from a large number of weather station reports are drawn to provide a full picture of the position, shape, size, and depth of the various weather systems in the area covered by it. These charts are normally kept up to date in meteorological offices around the world and, by a comparison with previous ones of the same area, meteorologists can see the directions in which movements are taking place and thus predict the weather patterns in the immediate future. The distance apart of the isobars gives a basis for the prediction of wind strengths; the closer they are together, the stronger the wind is likely to be. Weather forecasts broadcast from meteorological offices are based on the information obtained from synoptic charts.

See also marine meteorology.

See also marine meteorology.

Subjects: Maritime History — Meteorology and Climatology.

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