posted on Sep, 2 2013 @ 12:57 PM
To my understanding, lingering contrails don't occur during summer.
A Contrail is the reaction of warm and humid exhaust from an aircraft
interacting with very cold air in place at flight level. As the warm air from the engines condenses, water droplets are formed (just like a cloud), or
in some cases ice crystals similar to what we see in a cirrus cloud. Cirrus clouds are the wispy, feather like clouds that form very high in the
atmosphere. They are generally made of ice crystals, and the feather like pattern is created from the strong wind and turbulence found at high
Contrails are created when the temperature at flight level is colder than minus 40
So, how do you explain these?
September 2, 2013 10:45 a.m. PST
Is it possible that the temperature, at flight level, is -40 degrees, when it's been 90+ degrees on the ground, for the past few days? As i'm
checking out the sky, now, i see more trails being left behind; and they're on a constant basis. One after another. The sky is changing from blue
to gray. More pics to follow. I even got some neat video of the stop and spray action, they got going on, today.