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1 A band of precipitation or increased precipitation found in a depression. The bands may be several hundred kilometres long, with widths of 5–50 km, and lie approximately parallel to one of the fronts. Broad bands tend to be found ahead of the warm front, ahead of the cold front (in the warm sector), and also behind the cold front, which may itself be a much narrower rainband. Rainbands are mesoscale phenomena, poorly revealed by the synoptic network.

2 An obsolete term for absorption bands in the solar spectrum that are caused by atmospheric water.

Subjects: Meteorology and Climatology.

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