What are the main characteristics of cirrus clouds?

Cirrus clouds form in very cold air at high altitudes. Made of ice crystals, they have a wispy or feathery appearance. Strong winds often blow streamers or “tails” off cirrus clouds. These features show the direction of the wind in the upper troposphere.

What is a cirrus cloud made of?

Cirrus clouds often produce hair-like filaments—similar to the virga produced in liquid–water clouds—called fall streaks, and they are made of heavier ice crystals that fall from the cloud. The sizes and shapes of fall streaks are determined by the wind shear.

What kind of weather do stratus clouds bring?

Stratus clouds are low clouds that produce a hazy, gray veil with a uniform base throughout the sky. They do not usually produce precipitation, though drizzle or snow grains are possible with stratus clouds. One particular stratus cloud that affects transportation is fog.

Is a fog a cloud?

Clouds can form at many different altitudes. They can be as high as 12 miles above sea level or as low as the ground. Fog is a kind of cloud that touches the ground. Fog forms when the air near the ground cools enough to turn its water vapor into liquid water or ice.

What clouds are associated with rainstorms?

Clouds that produce rain and snow fall into this category. (“Nimbus” comes from the Latin word for “rain.”) Two examples are the nimbostratus or cumulonimbus clouds. Nimbostratus clouds bring continuous precipitation that can last for many hours.

Why do clouds form at higher altitudes?

When air rises in the atmosphere it gets cooler and is under less pressure. When air cools, it’s not able to hold all of the water vapor it once was. Air also can’t hold as much water when air pressure drops. The vapor becomes small water droplets or ice crystals and a cloud is formed.

How do you classify clouds?

Clouds may be classified by form and by height. Luke Howard (1772 – 1864), a British pharmacist was the first to describe cloud forms using Latin terms such as cirrus, cumulus or stratus. The division of clouds into ten basic cloud forms, or cloud genera is based on his publications.

What does the cirrocumulus cloud look like?

Cirrocumulus clouds are small rounded puffs that usually appear in long rows high in the sky. Cirrocumulus are usually white, but sometimes appear gray. They are the same size or smaller than the width of your littlest finger when you hold up your hand at arm’s length.

What is a stratus cloud look like?

Stratus clouds mean rain if it is warm and snow if it is cold. They look like a huge gray blanket that hangs low in the sky. Sometimes stratus clouds are on the ground or very near the ground, and then we call them fog. Usually stratus clouds and fog form when it has been cold out and then warmer, wet air blows in.

What is the Stratus cloud made up of?

Stratus clouds look like featureless gray to white sheets of cloud. They can be composed of water droplets, supercooled water droplets, or ice crystals depending upon the ambient temperature.

What kind of weather does a cumulus cloud bring?

Cumulus humilis clouds usually indicate fair weather. Cumulus mediocris clouds are similar, except that they have some vertical development, which implies that they can grow into cumulus congestus or even cumulonimbus clouds, which can produce heavy rain, lightning, severe winds, hail, and even tornadoes.

What are the clouds that look like huge puffs of cotton?

The halo is caused by cirrus clouds. The bright spot on the left is a “sun dog.” Cumulus clouds are big clouds. They can look like huge puffs of cotton.

What does a cumulus cloud look like?

Cumulus clouds are puffy clouds that sometimes look like pieces of floating cotton. The base of each cloud is often flat and may be only 1000 meters (3300 feet) above the ground. The top of the cloud has rounded towers.

Can cirrus clouds produce precipitation?

Since cirrus clouds arrive in advance of the frontal system or tropical cyclone, it indicates that weather conditions may soon deteriorate. While it indicates the arrival of precipitation (rain), cirrus clouds only produce fall streaks (falling ice crystals that evaporate before landing on the ground).

How does a cirrus cloud form?

The most common form of high-level clouds are thin and often wispy cirrus clouds. Typically found at heights greater than 20,000 feet (6,000 meters), cirrus clouds are composed of ice crystals that originate from the freezing of supercooled water droplets.

How high up is a cirrostratus cloud?

Cirrostratus are sheet-like, high-level clouds composed of ice crystals. Though cirrostratus can cover the entire sky and be up to several thousand feet thick, they are relatively transparent, as the sun or the moon can easily be seen through them.

What process allows clouds to form?

Clouds form when rising air, through expansion, cools to the point where some of the water vapor molecules “clump together” faster than they are torn apart by their thermal energy. Some of that (invisible) water vapor condenses to form (visible) cloud droplets or ice crystals.

What kind of weather do cirrus clouds bring?

Cirrus clouds are the most common of the high clouds. They are composed of ice and are thin, wispy clouds blown in high winds into long streamers. Cirrus clouds are usually white and predict fair to pleasant weather. By watching the movement of cirrus clouds you can tell from which direction weather is approaching.

What kind of weather is found in the Stratus cloud?

Stratus clouds are low clouds that produce a hazy, gray veil with a uniform base throughout the sky. They do not usually produce precipitation, though drizzle or snow grains are possible with stratus clouds. One particular stratus cloud that affects transportation is fog.

Do cirrus clouds produce precipitation?

If this cloud begins to precipitate, the base usually lowers, classifying it as a nimbostratus. Cirrus clouds are composed mainly of ice crystals due to their height in the atmosphere (6000 m, 20,000 ft and above). The dryness of the air higher in the atmosphere contributes to their thin, wispy look.

What type of cloud is formed by fog lifting in the morning?

Stratus clouds are among the low-lying clouds. They are gray clouds that cover the entire sky and can be the result of very thick fog lifting in the morning. Nimbostratus clouds are dark gray clouds that produce falling rain or snow. Cumulus and cumulonimbus clouds are both known as vertical clouds.

What do cirrus clouds predict?

High clouds exist above 18,000 feet and are cirrus clouds. Cirrus clouds are the most common of the high clouds. They are composed of ice and consist of long, thin, wispy streamers. Cirrus clouds are usually white and predict fair weather.

What layer of the atmosphere are cirrus clouds in?

The clouds listed in the figure on this page are found in the troposphere, which is the lowest layer in the atmosphere and is where weather occurs. Polar stratospheric clouds are located in a layer of the atmosphere called the stratosphere.

Originally posted 2022-03-31 05:57:58.

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