Altostratus undulatus duplicatus, 3:45PM on March 17, 2014 in Boulder, Colorado.

Altostratus undulatus duplicatus, 3:45PM on March 17, 2014 in Boulder, Colorado.

By Emily Kolenbrander for Spring 2014 Clouds Second.
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Stratocumulus on the bottom, and altostratus lenticularis on the top, near Idaho Springs, CO, 3/15/14 at 7:20 am.
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Altocumulus, Boulder CO, 7:19pm on March, 19th.

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