Contact stage of a microburst.
I am not a meteorologist, so if there are inaccuracies in this picture, please edit it or contact me in order to fix the inaccuracies.
<a href="https://en.wikipedia.org/wiki/User:Jarjames" class="extiw" title="en:User:Jarjames">Jarjames</a>, <a href="https://en.wikipedia.org/wiki/User:Bilious" class="extiw" title="en:User:Bilious">Bilious</a>
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Contactstage.jpg" title="File:Contactstage.jpg">Contactstage.jpg</a>