What are mammatos withdrawals?

<p style=";text-align:left;direction:ltr">Mammatus clouds are a group of clustered clouds that are connected to each other and resemble wrinkled cotton grains. Each cluster consists of parts connected to each other and extends hundreds of kilometers in length across the sky.</p><p style=";text-align:left;direction:ltr"> Mammatus clouds mostly form under cumulus clouds, and the upper and middle layers of the atmosphere must be humid and unstable, and under these layers there is a dry layer, and it needs the formation of an upward air current to appear in this distinctive shape</p><p style=";text-align:left;direction:ltr"> These clouds are formed due to the contrast between the cold upper temperature and the humidity in the lower layers of the atmosphere, and it is the fluctuation that creates such clouds.</p>