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When animation is used, this ability to discriminate snow and cloud is greatly enhanced.
To aid in the identification of high cloud, 6.7 micron channel imagery has replaced the 3.9 micron reflected energy product in this loop.
In the visible loop, many of the clouds are in motion while the snow remains stationary.
This is also true in the 10.7 and 6.7 micron loops, however, in the 6.7 micron loop, only the highest clouds are detected.
The 3.9 micron channel confirms the cloudy areas while also providing information on their phase.
In the 3.9 micron imagery also notice that the clear ground, which is relatively warm and reflective, appears bright and should not be confused with water cloud.
One caveat is in order: An area with persistent cloud cover may well have snow on the ground beneath that cloud as is certainly the case along the Big Horn Mountains in north-central Wyoming.
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