What does the phrase "cloud bubbling up" mean in weather

Name: What does the phrase "cloud bubbling up" mean in weather
Uploaded: 2023-06-26T15:19:57.000Z
Duration: 34 s
Description: Forecasters often use the expression "cloud bubbling up throughout the day" Sarah Keith-Lucas explains.

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Forecasters often use the expression "cloud bubbling up throughout the day" Sarah Keith-Lucas explains.

Weather

26 June 2023