Thanks, dbostedo. Believe it or not, it was shot with my phone--a Motorola Droid Turbo. It has the best camera of any phone I've seen, although it has a shutter lag that prevents its use for action shots. On the other hand, it also shoots 4K video....
The Droid Turbo shoots with very high resolution, allowing the photo above to be cropped from a considerably larger image, with still good sharpness.
Neat... that's interesting as it has a bit of B+W film-like look to the clouds (to my eye - I've never actually shot film, just looked at a lot of photos). It seems to work very well for that shot!