Aleutian low A region of the North Pacific, near the Aleutian Islands, where the average value of atmospheric pressure is low, owing to the frequency of low-pressure systems (cyclones) moving into and occupying the region. Any one of these systems, when present on an individual day, may be called ‘an Aleutian low’. Some of them are intense, others much less so. The term is the Pacific equivalent of ‘Iceland low’, used in the Atlantic.

Aleutian low Region of the N. Pacific, near the Aleutian Islands, where the average value of atmospheric pressure is low, owing to the frequency of low-pressure systems (cyclones) moving into and occupying the region. Any one of these systems, when present on an individual day, may be called ‘an Aleutian low’. Some of them are intense, others much less so. The term is the Pacific equivalent of ‘Iceland low’, used in the Atlantic.