Wrong. It's Tenerife and 25 deg C at noon. Winter. Yet sunny all day.
Check again in 4 hours. It will be overcast again. It's hazy everywhere
have you been following the latest postings around the net?
Can you explain the tell-tale patterns? X's, extensive grids, side-by-side parallel lines, etc. Continuous lines along the edge of extending overcast haze, as seen in my latest video. Why would the planes be flying along the edges of clouds like that? Why do they ALWAYS fly directly through the little tiny patches of blue in the sky to create a trail that fills the hole? Why are there clouds and overcast made of criss-crossing lines? (again, my latest video). Why would a trail be visibly segmented in a horizontal environment where the conditions are much the same? Why would clouds persist in a web-like fractal haze in open air and not dissipate? Trails are spotted at all altitudes in all temperatures and all humidity levels. What of the tens of thousands of eye-witness accounts, free for you to see on various video sites?
You have brought nothing we haven't already covered. There is far more to it than ice supersaturation (IF normal contrails can even persist longer than the standard 30-120 seconds in those conditions without additional particulate matter acting as condensation nuclei).