Types of Clouds: Cumulus and Stratus Explained

11 Questions

What is the distinguishing feature of cumulus clouds?

Flat-based appearance

At what altitudes do cumulus clouds typically form?

Below 6,500 feet (2,000 meters)

What type of weather is often associated with Cumulus humilis clouds?

Fair weather

What is a characteristic of stratus clouds?

Low-lying and featureless

What altitude range do stratus clouds typically form at?

Below 6,500 feet (2,000 meters)

Which type of stratus clouds are thin and not thick enough to obscure the sun or sky?

Stratus nebulosus

Which type of clouds can completely obscure the sky and sun?

Stratus cumulatus clouds

What weather condition are cumulus clouds often associated with?

Fair weather

How do stratus clouds affect sunlight and temperature?

Block sunlight and decrease temperature

Which type of clouds can indicate a precursor to the development of thunderstorms?

Cumulus clouds

What type of surface often leads to the formation of stratus cumulatus clouds?

Mountain range

Study Notes

Clouds: A Guide to Two Common Types

Clouds are a captivating natural phenomenon, gracing our skies with various shapes, sizes, and textures. As you gaze upwards, you'll notice two distinct types that are often seen: cumulus clouds and stratus clouds. Let's explore these cloud types in more detail.

Cumulus Clouds

Cumulus clouds, often referred to as "puffy" clouds, are easy to spot due to their distinct, flat-based, feathery appearance. They are usually white or gray and often have a cotton-like appearance. Cumulus clouds form at low altitudes, typically below 6,500 feet (2,000 meters), and are a common sight during the daytime.

Cumulus clouds can come in two varieties:

Cumulus humilis: These are low-level cumulus clouds that don't rise too high and are often associated with fair weather.
Cumulus congestus: These are taller and more towering cumulus clouds that can reach high into the atmosphere. They are often associated with developing thunderstorms and are the precursors to cumulonimbus clouds.

Stratus Clouds

Stratus clouds are low-lying and featureless clouds that spread out in a layer across the sky. They often have a uniform, flat appearance and can be white, gray, or even blue. Stratus clouds usually form at low altitudes, below 6,500 feet (2,000 meters).

Stratus clouds can also come in two varieties, based on their thickness:

Stratus nebulosus: These thin stratus clouds are not thick enough to obscure the sun or sky. They usually form when warm air rises over a cooler surface, such as a body of water.
Stratus cumulatus: These thicker stratus clouds can completely obscure the sky and sun. They usually form when cool air is trapped over a warmer surface, such as a mountain range.

Consequences of These Clouds

Both cumulus and stratus clouds have a significant impact on weather and climate.

Cumulus clouds are often associated with fair weather and can indicate rising air, which is a precursor to the development of thunderstorms.
Stratus clouds can block sunlight and create overcast conditions, leading to lower temperatures and increased humidity.

Summary

Understanding these two common cloud types will help you better appreciate and interpret the weather around you. Cumulus clouds are usually fair-weather clouds, while stratus clouds can block sunlight and bring overcast conditions. By recognizing these cloud types, you'll be better equipped to predict and enjoy the weather.