Cumulus clouds Rising warm air forms these puffy, low-altitude clouds which sometimes develop into storm clouds. (more) How Do Clouds Form? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/science/How-Do-Clouds-Form Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction Additional Information Other Your Feedback Submit Feedback Thank you for your feedback Our editors will review what you’ve submitted and determine whether to revise the article.

　　External Websites Ask the Chatbot a Question Written and fact-checked by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors. The Editors of Encyclopaedia Britannica Last Updated: Mar 4, 2025 • Article History Table of Contents Table of Contents Ask the Chatbot Cloud formation, a key part of the water cycle, begins as moist air ascends into the atmosphere. This occurs because, in most climates, moist air is less dense than dry air. As the air rises, it encounters lower pressures, causing it to expand and cool. The resulting cooling process is crucial because it brings the air temperature down to the dew point, where the air becomes saturated with water vapor. At this point, the water vapor begins to condense onto tiny particles in the air, known as condensation nuclei, forming the initial cloud droplets. Condensation nuclei play a vital role ...(100 of 294 words)

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