Highway in the Sky

I live in east county side of Portland. We had beautiful, unusual weather this morning, blue, cloudless sky, with no wind. I looked north and saw these white trails in the sky. This is the route from the south, north to most likely, Seattle.
http://home.comcast.net/~jwalborn1/w...3/site1062.jpg

Amazing photo!!! What causes that???

These are airplane condensation trails -- the wispy, white tails found in the wake of high-flying jets.

Wow! You captured a great picture!

That's a great photo! Must've been a belt of cool air just in the right place!