This week, I chose an image over Oklahoma a few days ago.
This week, there was severe weather off and on over Oklahoma. In this case, you can see several strong cells over northern Oklahoma, a flanking line stretching to the southwest away from those cells, as well as a narrow band of cumulus clouds along the frontal boundary. Ahead of it, you can see the rolling clouds that indicate shear, and you can see shadows from the anvils just east of the supercells.
Source:
High Plains Chasing 