low pressure area
region of the atmosphere in which atmospheric pressure is lower than that of surrounding regions
en-US/ˈloʊ ˈpɹɛʃɚ ˈɛɹiə/
en-GB/ˈləʊ ˈpɹɛʃə ˈɛəɹɪə/
region of the atmosphere in which atmospheric pressure is lower than that of surrounding regions