Error finding element ImageSmall

Error finding ID 749 in

Error finding content SELECT * FROM win_content WHERE PageID=749 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element Video

Error finding ID 749 in

Error finding content SELECT * FROM win_content WHERE PageID=749 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6571 in

Error finding content SELECT * FROM win_content WHERE PageID=6571 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6572 in

Error finding content SELECT * FROM win_content WHERE PageID=6572 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6573 in

Error finding content SELECT * FROM win_content WHERE PageID=6573 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6574 in

Error finding content SELECT * FROM win_content WHERE PageID=6574 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6575 in

Error finding content SELECT * FROM win_content WHERE PageID=6575 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6773 in

Error finding content SELECT * FROM win_content WHERE PageID=6773 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6729 in

Error finding content SELECT * FROM win_content WHERE PageID=6729 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6781 in

Error finding content SELECT * FROM win_content WHERE PageID=6781 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6782 in

Error finding content SELECT * FROM win_content WHERE PageID=6782 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6847 in

Error finding content SELECT * FROM win_content WHERE PageID=6847 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6849 in

Error finding content SELECT * FROM win_content WHERE PageID=6849 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 6850 in

Error finding content SELECT * FROM win_content WHERE PageID=6850 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 7098 in

Error finding content SELECT * FROM win_content WHERE PageID=7098 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 7099 in

Error finding content SELECT * FROM win_content WHERE PageID=7099 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 7100 in

Error finding content SELECT * FROM win_content WHERE PageID=7100 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 7101 in

Error finding content SELECT * FROM win_content WHERE PageID=7101 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Error finding element ImageSmall

Error finding ID 7125 in

Error finding content SELECT * FROM win_content WHERE PageID=7125 AND Element= AND (Level='elem' OR Level='all') AND Lang='en'

Altocumulus Clouds - Windows to the Universe
This is a photograph of altocumulus clouds.
Click on image for full size
Courtesy of UCAR Digital Image Library

Related links:

Next Cloud Type

Back to Cloud Types

How Clouds Form

Clouds Formed by Air Being Forced to Rise

Cloud Formation Due to Weather Fronts

Altocumulus

Altocumulus clouds are part of the Middle Cloud group. They are grayish-white with one part of the cloud darker than the other. Altocumulus clouds usually form in groups.

Altocumulus clouds are about as wide as your thumb when you hold up your hand at arm's length to look at the cloud.

If you see altocumulus clouds on a warm sticky morning, then expect thunderstorms by late afternoon.


Last modified September 25, 2007 by Becca Hatheway.

You might also be interested in:

Cool It! Game

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

Middle Clouds

The middle cloud group is made up of Altostratus and Altocumulus clouds. Middle clouds are made of ice crystals and water droplets. The base of a middle cloud above the surface can be anywhere from 2...more

Thunderstorms

Thunderstorms are one of the most exciting and dangerous types of weather. Over 40,000 thunderstorms happen around the world each day. Thunderstorms form when very warm, moist air rises into cold air....more

Altostratus

Altostratus clouds belong to the Middle Cloud group. An altostratus cloud usually covers the whole sky. The cloud looks gray or blue-gray. The sun or moon may shine through an altostratus cloud, but will...more

Stratocumulus

Stratocumulus clouds belong to the Low Cloud group. These clouds are low, lumpy, and gray. These clouds can look like cells under a microscope - sometimes they line up in rows and other times they spread...more

Cloud Formation and Weather Fronts

Weather fronts can cause clouds to form. Fronts happen when two large masses of air collide into each other at the Earth's surface. Warm fronts produce clouds when warm air replaces cold air by sliding...more

Altocumulus

Altocumulus clouds are part of the Middle Cloud group. They are grayish-white with one part of the cloud darker than the other. Altocumulus clouds usually form in groups. Altocumulus clouds are about...more

Cirrocumulus

Cirrocumulus clouds belong to the High Cloud group. They are small rounded puffs that usually appear in long rows. Cirrocumulus are usually white, but sometimes appear gray. Cirrocumulus clouds are the...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA