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.
« Back to Glossary Index Tweet Vote on HN Absolutely stunning supercell developed just prior to sunset as I was […]
« Back to Glossary Index Tweet Vote on HN Nature is definitely something majestic and completely unpredictable. Tornadoes are probably […]