.... we have had some very different sky effects since moving out here, and this afternoon was quite interesting!
One of those skies where the cloud showed high winds up high but then this "spot" of colour like a rainbow effect showed through.
It only stayed for a few minutes and felt it was too early for a sunset type colouring also fact it was just this spot?
Only conclusion for me was the conditions were such it was like a rainbow effect but it did not happen!!??
Enjoy, and have a look in LARGE
... the settings used were due me "chasing" a bird shot - and by time I took this and changed settings it was gone.....