A clear morning with a brisk sub-zero wind over the water is ideal for sighting steam devils.
There was only a gentle wind two days ago and the devils were not as grand as on some earlier occasions. Yet, as I get to see them play for only about a half hour every three years, and each devil lasts less than a minute, these ones were worth recording.
Steam devils are vortices in the wind made visible by the droplets of steam fog (just as a dust devils are made visible by tossed-up dirt). On a lake covered by steam fog, the devils can form almost anywhere, but are most easily seen when backlit against a dark background.
A steam devil is seen just as it forms.
Sometimes, a steam devil can extend tens of metres above the surface.
The best contrast is between the yellow sunlit devil and the dark bluish mountainside.