The word ‘synoptic’ simply means a summary of the current situation, so in weather terms, a synoptic or pressure chart is a map that summarises the atmospheric conditions over a wide area at a given time. Met Office North Atlantic analysis chart for 1200 GMT 27 March 2020 (Courtesy Met Office: Crown Copyright) And once you’ve got the hang of them, you’ll be able to tell at a glance what our weather is up to. Ever looked at a synoptic or pressure chart and felt a bit lost? They can seem a bit daunting at first, what with all the different coloured lines, semicircles and triangles, but they are actually quite simple to interpret.
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