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S'COOL: Altocumulus


image of altocumulus clouds during Texas spring  

Altocumulus during Texas spring

Photo by Mandana Khaiyer, March 1997, in San Antonio, TX. This is a nice picture of altocumulus, showing a tendency to form cloud 'streets' (i.e., rows of cloud), which is an indicator that there is some wave phenomenon occurring in the atmosphere.


image of Altocumulus during Virginia Summer  

Altocumulus during Virginia Summer

Photo by Lin Chambers, August, 2002. Notice the very puffy, cottonball look of the clouds at the top of this image. Compare to cumulus and cirrocumulus photos to contras the apparent size of the cloud cells.


image of Altocumulus during Virginia Summer  

Altocumulus during Virginia Summer

Photo by Lin Chambers, August, 2003. Hmmm... almost exactly a year after the image above, and a very similar cloud.


image of edge of altocumulus cloud field  

Edge of Altocumulus Field

Photo by Lin Chambers, August, 2003. This is the same day as the photo above. Note the very distinct edge to the Altocumulus cloud field. This is due to the fact that these clouds generally form along a front - the edge defines that front's location.


image of summertime altocumulus clouds  

Summertime Altocumulus

Photo by Jon Doughty, June 2007. Another nice example of summertime altocumulus in Virginia, again taken as the weather was changing in advance of a front. Note the thicker portion of the cloud at upper left. This cloud field was somewhat complex and challenging to identify. Determination of altocumulus was confirmed by looking at the cloud altitude and ceiling information on the Weather Underground website.