Outflow boundary

An **outflow boundary** is a meteorological term that refers to a boundary that marks the transition between cooler, denser air and warmer, less dense air, typically associated with the outflow of air from a thunderstorm or a significant weather system. When thunderstorms develop, they can produce strong downdrafts as precipitation falls through the atmosphere. This downdraft can lead to the formation of a cold pool at the surface, where the cooler air spreads out horizontally away from the storm.