Which cloud type generally indicates impending rainfall within 24 hours?

Which cloud type generally indicates impending rainfall within 24 hours?

• A. Cumulonimbus
• B. Cirrus
• C. Cirrostratus
• D. Stratus

Answer: (C)

The correct answer is Cirrostratus. This type of cloud is characterized by a thin, veil-like appearance that often covers the sky. Cirrostratus clouds are typically formed at high altitudes and are associated with the approach of a warm front. They can indicate that precipitation is on the way, usually within 24 hours. As these clouds move in, they can create a halo effect around the sun or moon, which is a visual sign that moisture is present in the atmosphere. Cumulonimbus clouds are tower-like and can indicate severe weather, including thunderstorms and heavy rainfall, but they are more specific to short-term weather events rather than a general indication of rainfall within the next day. Cirrus clouds are high, thin clouds that usually suggest fair weather. Meanwhile, stratus clouds often cover the sky in a uniform layer and may produce light drizzle, but they do not always indicate impending rainfall as clearly as cirrostratus.

The correct answer is Cirrostratus. This type of cloud is characterized by a thin, veil-like appearance that often covers the sky. Cirrostratus clouds are typically formed at high altitudes and are associated with the approach of a warm front. They can indicate that precipitation is on the way, usually within 24 hours. As these clouds move in, they can create a halo effect around the sun or moon, which is a visual sign that moisture is present in the atmosphere.

Cumulonimbus clouds are tower-like and can indicate severe weather, including thunderstorms and heavy rainfall, but they are more specific to short-term weather events rather than a general indication of rainfall within the next day. Cirrus clouds are high, thin clouds that usually suggest fair weather. Meanwhile, stratus clouds often cover the sky in a uniform layer and may produce light drizzle, but they do not always indicate impending rainfall as clearly as cirrostratus.