Definition
The development or strengthening of a low-pressure system (cyclone) in the atmosphere. It refers to the process by which a new low forms, or an existing one deepens, as winds organize around a center of falling pressure.
Plain English
The birth or strengthening of a low-pressure weather system. The atmosphere starts spinning up a new low, or an existing low gets deeper and stronger.
Context Anchor
Seen in weather discussions, forecasts, and briefings when a new low-pressure system is forming or an existing one is intensifying.
Derivation
From Greek 'kyklos' meaning 'circle' or 'wheel,' and 'genesis' meaning 'origin' or 'birth.' Literally 'the birth of a cyclone' — the formation of a circulating low-pressure system.
Why Pilots Care
Pilots monitor cyclogenesis because it signals rapid weather changes that can bring turbulence, icing, low ceilings, and strong winds along a route.
Grounding Statement
Picture a broad area of unsettled weather starting to organize and tighten into a stronger low-pressure system.
Intuition Check
Cyclogenesis does not mean only a tornado or hurricane is forming. In aviation weather, it usually means a larger low-pressure weather system is developing or strengthening.
Example Sentence 1
The forecaster noted rapid cyclogenesis off the East Coast, with the low expected to deepen overnight.
Example Sentence 2
Rapid cyclogenesis often brings unexpected instrument conditions that force a pilot to divert.