Meaning of CLOSED LOW in English

CLOSED LOW

A low pressure area with a distinct center of cyclonic circulation which can be completely encircled by one or more isobars or height contour lines. The term usually is used to distinguish a low pressure area aloft from a low-pressure trough . Closed lows aloft typically are partially or completely detached from the main westerly current, and thus move relatively slowly (see cutoff low ).

A comprehensive English glossary of weather.      Полный английский глоссарий погоды.