synoptic chart

American  

noun

1. a chart showing the distribution of meteorological conditions over a wide region at a given moment.

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Etymology

Origin of synoptic chart

First recorded in 1885–90

Example Sentences

These observations were sufficiently numerous to form a synoptic chart at a considerable height above Europe for comparison with the usual chart drawn from the surface observations.

From Sounding the Ocean of Air by Rotch, A. Lawrence

Figure 28.—Hachette's synoptic chart of elementary mechanisms, 1808.

From Kinematics of Mechanisms from the Time of Watt by Ferguson, Eugene S.