Definition

1. Noun:
   • A cirrocumulus cloud is a type of cloud that forms at a very high altitude. It appears as a thin, white patch, sheet, or layer composed of very small, regularly arranged cloudlets. These cloudlets often resemble ripples, grains, or a pattern of tiny, rounded masses, giving the cloud formation a dappled or wavy appearance.

Usage

• Cirrocumulus clouds are indicators of fair but possibly changing weather. They are often seen in the sky before a warm front arrives.
• This term is used in meteorology and general weather observation to describe a specific, high-altitude cloud formation.

Examples

• The sky was dotted with a delicate layer of cirrocumulus cloud, creating a beautiful mackerel pattern.
• When you see cirrocumulus clouds, it often means the upper air is unstable.
• The forecast mentioned the possibility of cirrocumulus clouds developing later in the day.

Advanced Usage

• "Cirrocumulus" (without "cloud"): In technical meteorological contexts, "cirrocumulus" is often used alone to refer to this cloud type. For example: "The sky is classified as having cirrocumulus."
• Descriptive Phrases: Often described with terms like "mackerel sky" (because the pattern resembles fish scales) or "cloudlets."

Variants and Related Words

• Cirrocumulus (n.): The abbreviated form of "cirrocumulus cloud."
• Altocumulus (n.): A mid-level cloud that looks similar to cirrocumulus but is found at a lower altitude and has larger, darker cloudlets.
• Cirrus (n.): A high-altitude cloud that is wispy and fibrous, often a component of cirrocumulus clouds.
• Cirrostratus (n.): A high-altitude, thin, sheet-like cloud that can cover the sky, often preceding cirrocumulus.

Synonyms

• Mackerel sky (informal, when the pattern is pronounced)
• High cumuliform cloud (technical description)

Related Phrases / Idioms

• "Mackerel sky": This is a common idiom and informal synonym for a sky filled with cirrocumulus (or sometimes altocumulus) clouds arranged in a pattern that looks like the scales of a fish. It is often associated with changing weather.
  • Example: "Mackerel sky, mackerel sky, never long wet, never long dry." (Traditional weather lore)

Noun

1. a cloud at a high altitude consisting of a series of regularly arranged small clouds resembling ripples