(Section 1.2.1.6)
- When seen at sea (waterspout), spouts appear as cloud columns or cones made up of water droplets raised from the sea surface, and are considered a hydrometeor.
- Spouts occurring on land (landspout, cold air funnel, and tornado) are typically made up of solid, non-aqueous particles raised from the ground. In this case they cannot strictly be classified as hydrometeors. However, the presence of a cloud column or cone is a basic criterion and therefore spouts are classified in this Atlas within the group of hydrometeors.
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