Yes, that'd be reflection in the snow.
The tint is because of the street lights. While most of the NYC street lamps have been converted to LED, there's still a fair amount of sodium vapor lamps, which glow yellow/orange.
I noticed lots of night photos I’ve had taken with mine has that yellow tint how can I get rid of it? I noticed some people are over saturating and sharpening some of their photos which don’t look good to me I like more muted tones like Instagram vintage look but everyone has their own preference.