Daft question but which Bangor? I've been to Bangor in Gwynedd several times but not enough to recognise that piece of road or to be certain about the hills in the background.
However it does look a lot like Gogarth next to Llandudno in the background to my untrained eye, in which case a southerly wind like we've had lately would roll off the tops in Snowdonia & could cause a mountain wave & thus lenticular like that.
Yes you're right.. From what I can tell this photo was taken facing east, just off the A55 on Station Road, Aber which is between Llanfairfechan and Bangor. We do get some wild weather around here, but this type of cloud formation is quite rare. Nice Photo
