Stratiform cloud may form during a warm front passage due to the steady, continuous rain falling from nimbostratus cloud, adding substantial amounts of humidity to the air. The cloud may form ahead of the front, in the cold air mass, or behind the warm front in the warm air mass.

Why does the Cumuliform cloud become a stratiform cloud?

By Appearance and Shape. Cumuliform clouds develop as a result of vertical motions by atmospheric instability. ... Stratiform clouds are horizontally layered clouds. They tend to spread into wide regions, and take on an appearance of a sheet or blanket.

How are cirrus clouds formed?

Cirrus clouds form from the ascent of dry air, making the small quantity of water vapour in the air undergo deposition into ice (to change from a gas directly into a solid). Cirrus is made up completely of ice crystals, which provides their white colour and form in a wide range of shapes and sizes.