rocket plume???

[PeterEde]

Huge trail from Western horizon to overhead. US launched a rocket yesterday? I think

[pluto]

There was a Dragon/Falcon 9 launch about 28 hours ago but the only burns they'd be doing today would be small and wouldn't be leaving a plume, especially a long one. That's the only launch I can find that happened recently.

[PeterEde]

I watched clouds pass by but this was very long and lasted until well past sunset when it either dissipated or just no long lit. Never seen a single cloud that long or that narrow almost like a beam the width of the full moon.
Maybe be a contrail?

[pluto]

If it was just after sunset then a contrail would be a good explanation. :)

[LewisM]

Contrail, very rare roll cloud (though usually bigger, I did see one over Perth once) or perhaps a cirrus cloud that had formed into an apparent trail formation (not uncommon)

[pmrid]

I wonder if it is related to this?

http://www.abc.net.au/news/2014-09-23/morning-glory-clouds-roll-in-over-northern-australia/5762388

Peter

[elfinke]

Well that is awesome.

[LewisM]

Yes, it's a roll cloud

[PeterEde]

What I saw was not very dense. Very streaked/wind blown
Just very long and long lasting