- Thin enough for the sun and moon can be seen through them
- Form in winter and summer depending on speed and strengths of weather front
- These clouds are above 18,000 feet
-Cirrostratus are sheet-like, high-level clouds composed of ice crystals. Cirrostratus clouds can cover the entire sky and be up to several thousand feet thick, they are also transparent enough for the sun and the moon to be seen through them.
- Cirrostratus clouds thicken as a warm front approaches, signifying an increased production of ice crystals.
- Altocumulus may appear as parallel bands or rounded masses.
- Altocumulus clouds usually form by convection in an unstable layer aloft, which may soon become a cold front.
These clouds can be up 2000-7000m up high.
An altostratus cloud usually covers the whole sky and has a gray or blue-gray appearance.
If rain will fall from an Altostratus cloud. If the rain hits the ground, then the cloud becomes classified as a Nimbostratus cloud.
- These clouds can be 2000-7000m up high.
- An Altostratus cloud usually covers the whole sky and has a gray or blue-gray appearance.
-If rain will fall from an Altostratus cloud. If the rain hits the ground, then the cloud becomes classified as a Nimbostratus cloud.
- These clouds can be 2000m up high
- These clouds are dark gray with a ragged base.
- Nimbostratus clouds are associated with continuous rain or snow. Sometimes they cover the whole sky and you can't see the edges of the cloud.
- These clouds are formed when warm, moist air is mixed with dry, cooler air and the mixture is moving beneath warmer, lighter air above.
- These clouds can be 1,000-7,000 ft up high
- These clouds can indicate if a bad weather is coming or a bad weather is clearing