Location: Opava City, Czech Republic
Date: 28 May 2014
When the surface warms in the afternoon sun, the air begins to rise, cooling and condensing to form clouds. This “convective” cloud formation can lead to continued growth of the cloud as long as the rising air is warmer than the surrounding environment. These cumulus congestus clouds (cumulus meaning “heap”, congestus meaning “piled up”) can eventually grow to taller cumulonimbus clouds if these conditions remain unstable.