noun
cold vortex
Meteorological term for a large-scale upper-level low-pressure system with a core of cold air; often associated with unstable weather.
コールドボルテックスが接近すると、大気が不安定になりやすい。
When a cold vortex approaches, the atmosphere tends to become unstable.
Spelling with interpunct; less common but seen in some contexts.
Loanword from English 'cold vortex'.