Splashing Overshoot
Sometimes, overshooting storm tops generate their own tufts of cirrus clouds, higher than the level of the storm’s main anvil shield and downshear (here, rightward) of the upthrusting dome. While often seen on high-resolution satellite imagery of intense thunderstorms (including supercells, like this), the “splashing” effect sometimes appears from the ground, and is an uncommon treat to behold. Even more so is when a huge overshoot splashes into the sunset light, as happened with this storm in southern Kansas (seen from northern Oklahoma).
7 WSW Lamont OK (14 Jun 17) Looking NE
36.6803, -97.6687