Which one of the following weather conditions indicates a sudden fall

Which one of the following weather conditions indicates a sudden fall in barometer reading ?

Stormy weather

Calm weather

Cold and dry weather

Hot and sunny weather

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Answer is Wrong!

This question was previously asked in

UPSC NDA-1 – 2015

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A barometer measures atmospheric pressure. A sudden fall in barometer reading indicates a rapid decrease in atmospheric pressure. Falling atmospheric pressure is often associated with approaching low-pressure systems. Low-pressure systems are typically accompanied by unstable atmospheric conditions, rising air, cloud formation, precipitation, and often, stormy weather. Conversely, rising pressure indicates stable conditions (usually associated with clear or fair weather), and steady high pressure indicates calm, dry, and often clear weather. A sudden fall specifically points towards a rapidly developing or approaching weather disturbance, which is characteristic of stormy weather.

A sudden drop in atmospheric pressure (barometer reading) indicates unstable weather conditions, often preceding or accompanying storms.

Forecasters use changes in atmospheric pressure to help predict weather changes. A steady fall may indicate rain, while a rapid fall often indicates a strong storm or depression approaching. High pressure generally leads to clear, calm, and stable weather.

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