escape, leak, leakage, outflow (noun)

the discharge of a fluid from some container

"they tried to stop the escape of gas from the damaged pipe"; "he had to clean up the leak"

outflow, effluence, efflux (noun)

the process of flowing out

spring, fountain, outflow, outpouring, natural spring (noun)

a natural flow of ground water

outflow (Noun)

The process of flowing out

outflow (Verb)

To flow outward.

Outflow

Outflow, in meteorology, is air that flows outwards from a storm system. It is associated with ridging, or anticyclonic flow. In the low levels of the troposphere, outflow radiates from thunderstorms in the form of a wedge of rain-cooled air, which is visible as a thin rope-like cloud on weather satellite imagery or a fine line on weather radar imagery. Low-level outflow boundaries can disrupt the center of small tropical cyclones. However, outflow aloft is essential for the strengthening of a tropical cyclone. If this outflow is undercut, the tropical cyclone weakens. If two tropical cyclones are in proximity, the upper level outflow from the system to the west can limit the development of the system to the east.