By definition of cumulonimbus cloud, at its top water droplets are transformed into ice crystals, but for cumulonimbus calvus content of ice crystals is small and freezing is in early stage, so cloud top still looks round and puffy.
But for cumulonimbus calvus, content of ice crystals are meager and polar are in early stage, so cloud tops still look round and puffy. By definition of cumulonimbus cloud, at its top water droplets are transformed into ice crystals.
By definition of cumulonimbus cloud, at its top water droplets are transformed into ice crystals. But for cumulonimbus calvus, content of ice crystals are meager and polar are in early stage, so cloud tops still look round and puffy.
By definition of cumulonimbus cloud, at its top water droplets are transformed into ice crystals. But for cumulonimbus calvus, content of ice crystals are meager and polar are in early stage, so cloud tops still look round and puffy.