The Klein Karoo is a good example of this. A turbulent cloud formation that resembles a roller. This cloud can be found in the lee of some mountains. The air in the cloud rotates around a axis parallel to the range of mountains. It is also sometimes found along the leading edge of a thunderstorm, formed by the rolling action in the wind shear region between cool downdrafts and warm updrafts.
Severe thunderstorms can result in the loss of life and property.
Sleet Describes the solid grains of ice formed by the freezing of raindrops or the refreezing of largely melted snowflakes. A natural fog contaminated by industrial pollutants, literally, a mixture of smoke and fog. Snow A steady fall of snowflakes for several hours over the same area. A periodic, large scale atmospheric oscillation of the large scale distribution of sea level pressure, and air and water temperature that originates over the southern hemisphere. Consequently, there is an associated change in the surface winds, and some storms become stronger than normal.