I am trying to understand the parameters that went into your choice of exposure. I realize that the rules some times have to be broken, when I look at the raw file under the finished image, on my screen the dark tones looked blocked out. If ETTR is to be in effect, should the exposure have been different? Also was this a aperture priority exposure or manual? Perhaps the time sensitivity - storm is atop you etc., determined a lot of things; there was enough detail in the shadows to bring out the fence etc. during post processing - did you see this in the viewfinder prior to the exposure?
The image is outstanding - especially considering the amount of time available to set up and take the image.