20th January:
From 54s to about 1.07, a darker ribbon seems to go through the clouds tracking north to south. The effect seems to cause the cloud above to melt away. It's not a contrail as they are straight and also the conditions were not suitable for long last contrails.
http://www.youtube.com/watch?v=WGNdDKSE3ng
Originally Posted by: KevBrads1