Cumulus humilis clouds are commonly referred to as “fair weather cumulus” as they occur under pleasant conditions. They form at the level of condensation (see their well-defined cloud bases at the same level) as pockets of warm air rises and are limited in vertical growth due to more stable conditions (typically sinking air above). They are taller than wide and are a pleasant sight.

Angela Rowe
Location: Jerome, Arizona
Date: September 2011



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