The TIFF file is 3815 X 2641 pixels so only gnat's cock of cropping. Clouds are grey, not blue, but they have seen the Burn Tool. The horizon was about 2 degrees off horizontal, hence the need for the crop.
Clouds are grey, not blue, but they have seen the Burn Tool.
'I didn't get where I am today...' by not knowing a sky that's been nobbled. Unless it's your accursed ISO100 at work; I guess the clouds move during the exposure