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September 2, 2024
Altocumulus lenticularis, which is a visually stunning cloud feature that is usually caused by a moist airstream flowing over raised ground, such as a hill or mountain peak. When the atmosphere in the area is stable, the air can develop a wave-like motion downstream, invisibly rising and dipping in the lee of the peak. If the air rises and cools enough, lenticularis clouds can appear at the crests of these waves. When the airstream contains layers of moist air separated by drier air, a stacked formation can appear, known as ‘pile d’assiettes’. This example was spotted over Fairbanks, Alaska, US.
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June 11, 2024
Cavum, also known as a Fallstreak hole, spotted over the University of Alaska in Fairbanks, Alaska, US
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October 27, 2023
The sky at night over Fairbanks, Alaska.
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