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Instability

The state of equilibrium in which a parcel of air when displaced has a tendency to move further away from its original position. It is the condition of the atmosphere when spontaneous convection and severe weather can occur. Air parcels, when displaced vertically, will accelerate upward, often forming cumulus clouds and possibly thunderstorms. Refer to absolute instability and unstable. Contrast with stable air.

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  • Part of Speech: noun
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  • Industry/Domain: Weather
  • Category: General weather
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