I just got back from leading one of many SW tours lined up this spring and my client and I scored with stormy lighting on this trip. It was actually snowing at this location which was immensely beautiful and very peaceful. After shooting a wide array of compositions during sunset, we decided to go back to this tree to shoot it under the lighting of the full moon, at night. It is rare but I recognized the excellent conditions as high altitude clouds were ripping by, yet the air was mainly calm where we were and the full moon lit everything up almost like day (no head lamp needed). Our goal was a hint of tact sharp stars (no more than 20-25 seconds) to shoot at a sharp f/stop (near or at f/5.6 on the 16-35L2) yet have the cloud streaking maximized/exaggerated. We shot side by side until near midnight when the storm finally passed. This is one of my favorites.
Canon 16-35L2 @16mm
25 second exposure
In camera noise reduction on (dark frame)
*Image was double processed in ACR. One with luminance reduction off and capture sharpening on (for the land and tree) then one other identical shot but with capture sharpening off and a little luminance reduction on to keep the sky from getting grainy.