Orographic Cloud

Formed as air is forced to rise over elevated terrain, cloud base is dependant on prevailing conditions, but is similar in range to that of other low level clouds. Orographic cloud is often in contact with the ground at the hill top. These clouds often do not produce precipitation, but larger systems may produce drizzle. Heavier rain is generally due to thicker cloud above. Orographic cloud may be liquid or ice depending on prevailing conditions and terrain altitude.