A term applied to a kiln in which the direction of travel of hot gasses from the fire is continuously upward through the ware chamber to the chimney and eventual freedom
Warm moist air which rises and condenses into a visible cumulus or cumulonimbus cloud Once the cloud forms, it depends on the updraft for continuance and further development
A small-scale current of rising air If the air is sufficiently moist, then the moisture condenses to become a cumulus cloud or an individual tower of a towering cumulus or Cb
A small scale current of air with vertical motion If there is enough moisture, then it may condense, forming a cumulus cloud, the first step towards thunderstorm development