in Thoreau’s Journal:

A still, completely gray, overcast, chilly morning. At 8:30 a fine snow begins to fall, increasing very gradually, perfectly straight down, till in fifteen minutes the ground is white, the smooth places first, and thus the winter landscape is ushered in.

And now it is falling thus all the land over, sifting down through the tree-tops in woods, and on the meadowand pastures, where the dry grass and weeds conceal it at first, and on the river and ponds, in which it is dissolved. But in a few minutes it turns to rain, and so the wintry landscape is postponed for the present.