Cirrus Clouds

Cirrus clouds are high-altitude clouds that are thin, wispy, and often appear as delicate filaments. They are composed of ice crystals and are found at elevations above 20,000 feet (6,000 meters). Cirrus clouds are typically white and have a transparent appearance.

Formation of Cirrus Clouds

Cirrus clouds are formed when water vapor in the atmosphere condenses directly into ice crystals. This often occurs in regions of the atmosphere where temperatures are extremely cold, such as in the upper troposphere. The ice crystals may form around tiny particles, known as cloud condensation nuclei, that serve as a nucleus for the ice crystal growth.

Characteristics of Cirrus Clouds

• Thin and wispy appearance
• High-altitude, typically above 20,000 feet
• Composed of ice crystals
• Often associated with fair weather, but can also indicate a change in the weather

Study Guide

Here are some key points to remember about cirrus clouds:

1. Where are cirrus clouds typically found in the atmosphere?
2. What are cirrus clouds composed of?
3. What is the characteristic appearance of cirrus clouds?
4. What type of weather are cirrus clouds associated with?
5. How are cirrus clouds formed?

It's important to understand the formation, characteristics, and significance of cirrus clouds, as they play a role in weather patterns and can provide valuable information to meteorologists.