That is not a metaphor. "The snow was a dirty blanket over the parking lot" would be a metaphor. It is a figure of speech that compares two very different things- snow and a blanket.
Drifted snow is like a soft, white blanket covering the earth, creating a peaceful and serene landscape.
as soft as a blanket
The phrase "snow is a white blanket" is a metaphor that conveys the idea that snow covers the ground uniformly, creating a smooth, soft, and pristine appearance, much like a blanket enveloping an object. It suggests a sense of warmth and comfort despite the coldness of snow, evoking feelings of tranquility and beauty in a winter landscape. This imagery emphasizes the transformative effect of snow on the environment, softening harsh features and bringing a serene aesthetic to the scene.
That is a simile because it is comparing the warmth of the breeze to the warmth of a blanket using the word "as."
You are going to be hard-pressed to find a metaphor for blanket since metaphors use a common object to symbolize a more complex concept. Blankets are fairly common objects so they usually become the symbol. You will find snow, metaphorically blanketing the ground and you will find a 'wet blanket' in attendance at most parties. You will find 'blanket rules' that have nothing to do with a bed and if you look hard enough, you will find a 'security blanket' that may not be made of cloth.
A metaphor for fog could be a "veil of mystery" or a "blanket of uncertainty" that obscures clarity and vision.
the snow howled
I think its a metaphor. its not using like or as, like all similes are supposed to.
It means that the street is completely covered by a solid sheet (or metaphorical blanket) or snow. Someone looking at it would only see snow, and not the street.
A snow blanket
"Blanket of softness beneath your feet."