I love the sky, but I think the composition of splitting the photo basically in half both halves less important. It might be stronger if you placed the horizon at the top 1/3. You'd still retain much of the interesting sky, but it would also give more importance to the creek.
I like the way the creek leads the eye into the photo. It reminds me of an infrared, which to me is a good thing. Excellent focus and pp coupled with a great composition - I like the way the two lines of clouds in the sky echo the line of the creek.
Wow, what a great shot!! Love the drama in the sky, love the way the stream leads the eye. The texture of the grass comes out very nicely...plenty of interest!