I found this one a little hard to judge.
I cant make my mind up as to whether or not it complies with the rules of the challenge which states"Take your best photo representing one of these signs".
I know that in most competitions it would have been rejected as not fulfilling the category but I think in DP challenge a little more lattitude is OK.
Pictures of blue sky and clouds can be good - bad - or indifferent. The main criterea withing that is
a: Is it well exposed
b: Does it show something
c: Is it aesthetically pleasing.
I think the idea was OK but it would have been worth reframing and cropping to try and make a particular cloud a centre of interest for the eye - or concentrated on getting a patch of sky framed by cloud.
David
Only the title links this to the challenge in any way. The image itself fails to convey the theme completely. It also lacks visual interest for me - no focal point and no unusual composition (from cloud shapes etc) either.