Ragged clouds, often referred to as fractus clouds, are small, irregular cloud fragments that appear torn or shredded, typically found beneath a larger cloud formation.
Understanding Fractus Clouds
Fractus clouds are a fascinating phenomenon, often seen as wispy or tattered remnants of a larger cloud system. Here’s a breakdown of their characteristics:
Key Characteristics of Ragged Clouds
| Feature | Description |
|---|---|
| Appearance | Small, ragged, and irregular fragments; often described as "torn" or "shredded". |
| Location | Typically found under the base of a larger cloud. |
| Formation | Result from a larger cloud breaking apart or forming independently in humid air. |
| Wind Impact | Often influenced by strong winds, which contribute to their jagged appearance. |
Types of Fractus Clouds
Fractus clouds come in two main forms:
- Fractostratus: Ragged fragments of stratus clouds.
- Fractocumulus: Ragged fragments of cumulus clouds.
How Ragged Clouds Form
The reference states that fractus clouds form from a larger cloud, or are formed independently in humid air and then sheared by wind. Here is more detail on this:
- Break-off from larger clouds: When a larger cloud breaks apart, small pieces can be left behind. These pieces then become fractus clouds.
- Wind Shearing: Strong winds can shear or tear apart existing clouds, creating their ragged look. The wind is a key factor in shaping fractus clouds.
- Humid Air: Under humid conditions, these ragged clouds can also form independently.
- Ambient Conditions: Fractus clouds tend to form near the ambient cloud base of other cloud types.
Practical Insights
- Weather Significance: These clouds usually indicate unstable atmospheric conditions or the presence of a nearby weather system.
- Observational Clues: Their appearance can indicate the direction and intensity of low-level winds.
- Visual Indicator: They provide a visual clue about the processes happening in the lower atmosphere.
Conclusion
Ragged clouds, or fractus clouds, are small, torn fragments of larger clouds, often shaped by strong winds. They can form from the break-up of bigger clouds or independently in humid air, generally below the base of larger clouds.
