- Cloud types, Cu: Why clouds form where they do, a line of Cumulus
- W941707Z
- Cloud types, Cu: Why clouds form where they do. This single line of Cumulus clouds likely formed preferentially within a streak of moisture downwind from a forest or lake. Within the higher dewpoint air in the plume, daytime heating allows thermals to condense at a certain level. In adjacent drier air, warmed air parcels need to rise higher to attain condensation and this morning air mass is not yet warm enough to allow this, so the sky remains clear there.
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