Cirrus Clouds

Cirrus clouds are high-altitude clouds that are thin, wispy, and often have a feathery appearance. They are composed of ice crystals and are commonly found at altitudes above 20,000 feet.

Characteristics of Cirrus Clouds:

• Appearance: Thin, wispy, and feathery
• Altitude: Found at heights above 20,000 feet
• Composition: Composed of ice crystals
• Weather Indicators: Their presence may indicate fair weather, but they can also be a precursor to a change in weather as they can signal the approach of a warm front.

Formation of Cirrus Clouds:

Cirrus clouds form in the upper troposphere when water vapor condenses directly into ice crystals. They can be created by the lifting of air masses, often associated with the approach of a front, or by the presence of high-altitude wind patterns.

Study Guide for Cirrus Clouds:

1. Describe the appearance of cirrus clouds.
2. At what altitudes are cirrus clouds commonly found?
3. What are cirrus clouds composed of?
4. What weather conditions do cirrus clouds typically indicate?
5. How do cirrus clouds form?