With it being a sunny day, we, the subjects and the photographer have to wait for the cloud coverage to roll over head (the images above show a simple 5 minutes apart.
The set up for these shots was straightforward and I used one light source. I used a Profoto B1 and a giant shoot through umbrella to do 2 things, one light the subject to pop out from the background and two to diffuse the ever changing and at times harsh directional light from the sun (as it was 09:30a).