But difluence is not the same as divergence . In a difluent flow, winds normally decelerate as they move through the region of difluence, resulting in speed convergence which offsets the apparent diverging effect of the difluent flow. A veering wind with height in the lower part of the atmosphere is a type of directional shear often considered important for tornado development. It is the opposite of convergence . Downburst - A strong downdraft resulting in an outward burst of damaging winds on or near the ground.
Downburst winds can produce damage similar to a strong tornado .
Although usually associated with thunderstorms, downbursts can occur with showers too weak to produce thunder. See dry and wet microburst . A downburst is the result of a strong downdraft. Downstream - In the same direction as a stream or other flow, or toward the direction in which the flow is moving. Dry Adiabat - A line of constant potential temperature on a thermodynamic chart .