Zigzag clouds are called altocumulus undulatus clouds, also known as a mackerel sky or wave clouds.
These clouds, often displaying a striking zigzag pattern, are a type of mid-level cloud. The term "undulatus" refers to their wave-like appearance, which can sometimes form distinctive zig-zag shapes across the sky. The term “mackerel sky” comes from the resemblance of the patterns to the scales on a mackerel fish.
Understanding Altocumulus Undulatus Clouds
Here's a deeper look at these unique cloud formations:
- Formation: These clouds form at mid-altitudes, typically between 6,500 and 23,000 feet (2,000 to 7,000 meters). They are created by air currents moving over and around air masses.
- Appearance: They appear as layers or patches of grayish-white clouds with some parts darker. The undulations or waves make the zigzag pattern.
- Causes: The wavy pattern is often caused by the wind shear between different layers of the atmosphere, which creates a rippling effect in the cloud layer.
- Associated Weather: Altocumulus undulatus clouds usually don't bring precipitation and are considered harmless, even pretty.
Key Features
Here are the key characteristics of zigzag altocumulus undulatus clouds:
| Feature | Description |
|---|---|
| Type | Mid-level cloud |
| Altitude | 6,500 to 23,000 feet (2,000 to 7,000 meters) |
| Pattern | Wave-like or zigzag |
| Other Names | Mackerel sky, wave clouds |
| Precipitation | Rarely brings precipitation |
The reference provided specifically describes these clouds, seen with a zigzag pattern in the Irish sky, as "altocumulus undulatus clouds" also known as "a mackerel sky" or "wave clouds."
