Consider:
1. In the first sentence, Wolff lets us in on the father's character. Dad likes jazz, a music of improvisation, spontaneity, and abandonment of formal rules. Jazz is a symbol enabling us to understand something essential about the father without Wolff having to tell us directly.

2. While the father loves the thrill of the blinding snow on the ski slopes, the boy refers to it as "bitter." On the last ski run, he sticks to his father "like white on rice" out of fear—he can't see the trail. That fear is repeated when the two head down the snow-covered road. The boy is anxious when he can't see what's ahead of him.

3. We never meet Mom, but we feel we know something about her. She seems strict and argumentative. The image of the perfectly set table, just waiting for the red candles to be lit, seems to indicate someone who adheres to order. Mom and Dad seem to be a troublesome match.

4. The boy is sullen throughout most of the story, uncomfortable with his father's free wheeling style. He's a kid who puts his clothes on numbered hangers, and asks for homework in advance: he's overly dependent on planning and fears the unexpected, a life that makes no room for spontaneity. No wonder he's terrified when he looks at the snow on the road and can't see in front of him.

5. The boy crosses a symbolic threshold (the roadblock) and begins to admire his father's skill and finesse, enjoying the excitement of living without complete foreknowledge and planning. He eventually understands that there is something beautiful about not knowing exactly where you are going—the adventure of life.

6. Powder becomes a symbol for something fresh, a new beginning, covering up of the old tracks, old habits, and offering an opportunity to lay down new tracks.