The cows are almost a little camo. Too bad they couldn't stand out just a little more. Sky is good. Balance between sky and ground seem appropriate for the occasion.
This is probably just because of location, but I wish January looked like this here. It's usually replaced with about 5 feet of snow and boring smooth overcast skies. I like the dynamics in the clouds, though I think they could be doing more... not like that is in your control though. The livestock is barely hanging onto the frame... but that doesn't really bother me too much. I would really like to have seen something breaking the horizon line into the sky because they are really two separate elements here. There is a hint of something in the background but it is easily dismissed.
Very nice clouds. I'd be tempted to make the foreground just a tad brighter. (I know the storm's coming in, but it's a wonderful foreground and it seems to disappear.
seems like you are choosing to big of an area...if you would have cropped out the field to the left that would have been enough...keeping the cows as the focal point...