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Image Credit: Earthsky
What are hole-punch clouds, aka fallstreak holes?
- Hole-punch clouds, or fallstreak holes, are circular clearings in altocumulus cloud layers.
- They form when aircraft trigger ice crystal formation in supercooled water droplets in clouds.
- Jets' low pressure zones over wings cause air to cool rapidly below cloud temperature.
- This leads to ice crystal growth, rain, and snow, creating stunning cloud patterns.
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