The above visible satellite image was taken just a few moments ago. As the sun lowers in the sky and the shadows are cast in a more definitive way, you can see some awesome sights indeed!
The red arrows point out 3 smoke plumes from wildfires burning in the Texas Panhandle and extreme east-central New Mexico.
Within the yellow circled area, you can see towering cumulus attempting to develop into thunderstorms along the dryline in southcentral Kansas and northwest Oklahoma. One cell has succeeded so far, with a thunderstorm developing near Greensburg, Kansas currently. Here's another perspective on the developing Greensburg storm, taken on the ground by Verne Carlson (via Twitter):
Back to the visible satellite image at the top of the post; within the red circled area, you can see numerous supercell thunderstorms along and near the Nebraska / Iowa borders. One cell near Mapleton, IA appears very capable of producing a tornado, as indicated on the latest radar image from the Omaha radar below:
The left half of the image shows the radar's reflectivity mode (i.e., rain, hail, etc.). The right half shows velocity (wind motion). Remember, in the wind motion image, greens are winds blowing toward the radar, and reds are winds blowing away from the radar. The radar is located just off the lower left corner of the images. I noted the circulation on the velocity display with the yellow arrows.
Ground reports confirm a tornado with this storm. See the aggressive wording in the latest Severe Weather Statement issued by the NWS: