"Jose" wrote in message
...
Last September I flew from Santa Rosa to Renton and photographed an
interesting cloud which reminded me of what a jet contrail might look like
if somebody flew an arc over a river. Pictures posted he

http://www.flying20club.org/streamer.html

Anybody seen anything like this before? Any idea what might make it?

Could you clarify the question?

I can't tell from looking at the photos what cloud it is you're asking
about. There are cirrus, contrails, low-level stratus, and even some
cumulus-wannabe clouds in there. If I had to guess, I'd suspect you're
asking about the low-level cloud that is skinny through the right two-thirds
of the photo, expanding into a larger formation to the left one-third. But
you also say the cloud reminds you "of what a jet contrail might look like",
and that cloud doesn't look anything like a contrail to me (and of course
isn't where one would see a contrail).

Maybe you could provide a photo with the cloud in question highlighted
somehow (outlined, or maybe use Photoshop or GIMP to darken the areas
outside your interest).

Pete