never before seen this!

[JRB549]

One of my coworkers called me to ask what he was seeing, and I've never seen this before.
A blue line preceding a jetliner that left a vaportrail, it was as if the blue line was the same as its flight path but it was wild to see, any body seen this before?

[Cobra Doc]

I'll bet the sun was behind the airplane. It was casting a shadow on ice or dust particles in the air. When you see it at that angle in looks like the sky is parting in deference to the airliner.

[gyroparts]

Ive seen that quite a few times. Cody is right, it is the shadow of the vaportrail.

[gyroplanes]

I've seen that as well. I also saw a 757 fly through a thin cloud layer and bore two engine holes through it. Amazing.

I had a 737 pass low overhead on final approach and the humidity enhanced vortices hung spinning in the air. One of them started undulating up and down then split in two with a very audible POP. I hung around for some more of this hoping one of the vortices would get low enough to play with.

[Timchick]

A blue line preceding a jetliner that left a vaportrail, it was as if the blue line was the same as its flight path but it was wild to see, any body seen this before?

If the blue was in the vapor trail someone just flushed.:D

[Cobra Doc]

Tim, only a Zoomer or RDF would know that! (So I guess we got it "covered".)

[JRB549]

The blue line preceded the plane, it cut right into the clouds and it went to the horizion.
Same flight path today with no blue line

[Thomas]

Maybe it was one of those blue VOR ROUTE lines you see on vfr area maps. :D
Trails can last a long time, maybe the jet ahead left its mark for the rest to follow.

Thomas

[JRB549]

This is what a PPS Pilot said it was the shadow of the airplane falling onto the preceding clouds because the sun was behind the plane.

[Cobra Doc]

Why does that sound so familiar?
What the heck is a PPS Pilot?