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Observed at 02:00, Monday 17 February BBC Weather in association with MeteoGroup, external All times are Central European Standard Time (Europe/Madrid, GMT+1) unless otherwise stated.

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The great winter holdout: Why Western Canada’s cold snap won’t quit ...

Higher pressure is usually associated with sunny weather, lower pressure with stormy weather. The temperature to which the air needs to be cooled for moisture to condense, for example, as dew.