(Cs)
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Height of base: |
above 5000 to
10000 m (16,500 – 30,000 ft) (high-level clouds) |
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Description: |
Milky veil of
high-level cloud; Either smooth or
vibrous Cover large areas Haloes, mock suns |
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Occurrence: |
World-wide |
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Made of: |
falling ice
crystals |
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Precipitation: |
None |
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Formation: |
Joining
of cirrus clouds |
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Species: |
Fibratus,
nebulosus |
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Varieties: |
Undulatus,
duplicatus |
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How to distinguish
from … |
Altostratus (As) |
Cs is thinner and
produces halo phenomena; As only produces
coronae Cs allows a
shadow to bee seen on ground |
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Cirrus and
cirrocumulus (Ci, Cc) |
Both have
distinct elements, which Cs does not have |
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Cirrostratus fibratus and altocumulus
castellanus Morris, May 07 |
Cirrostratus fibratus Morris, Jan07 |
Cirrostratus fibratus, note the
circumzenithal arc Morris, Jan 2008 |
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Cirrostratus nebulosus, with halo Morris, April5, 2008 |
Cirrostratus nebulosus, noticeable by
its halo and corona effect. Morris, May 18, 2008 |
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Last
modified: 5/19/2008
Maintained
by Sylke Boyd