Hot air is the precursor to thunderstorms. This usually happens following extended warm spells, such as heatwaves, during which extremely high temperatures heat the Earth and the atmosphere.
Warm air rises through the atmosphere, begins to cool, and condenses into droplets of water as it ascends.
When these droplets begin to move within the cloud, they will ascend even higher into the atmosphere if the surrounding air is cold.
Since the atmosphere is unstable, cumulonimbus clouds – the only kind of cloud that can produce hail, thunder, and lightning – are formed during thunderstorms.
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