The low clouds/fog were not very thick (vertically). The drone stayed lower than 400 feet. Here is the morning sounding (vertical profile of the atmosphere) from Fort Worth, TX .
If you watch the video above, once the drone gets above the clouds/fog the sky is clear and sunny. If you look at the sounding above you can see why. The red line (temperature) and green line (dewpoint) spread out indicating dry air resulting in a clear sky. At the bottom of the image (lowest part of the atmosphere) those two lines come together where the low clouds/fog were.
Posted under Fog
This post was written by Schnack on December 9, 2014