Dear David,
The foreground trees along the river's edge happen to be covered in "Hoar Frost" ...
Excuse me if you already know this fact, but this effect occurs when moist warm air comes in contact with any bitterly cold body, causing long needle like ice crystal formations to rise and grow on the surface of the cold body instantly. The warmer flowing Vermillion River provided the source of the moisture, and the dense cold air mass during the stillness of the night more than likely caused a moist fog to rise off the river, which enveloped the trees along the river's edge, generating the effect you see in the image. The hoar frost can remain for a day or several hours, where the frost can be dispersed quickly by a brisk wind, or warmer daytime temperatures. The middle trees lost their snow cover days before, and my log book indicates that the daytime temperature happened to be minus twenty-eight degrees Celsius.
I got lucky with the view that day...
The mountain range in the background is named Hawk Ridge, just before the range runs into the Mitchell Range along Highway 93 South within the boundaries of Kootenay National Park, British Columbia, Canada.
jim k
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Originally Posted by Steve Gledhill
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