Snow is very noticeable. It's weather that is very pretty and visual, but also impacts your daily life.
I remember how many snow days I had back in school, and how kids now often don't have any
It's very visceral and memorable weather - most other things are vague and easy to write off, or they're a life changing catastrophe that is basically up to luck.
If snow is what makes people understand, viscerally, "things are changing very, very fast", then that's fine
That's where we are right now. People generally believe it's happening, but only intellectually - they have no sense of scale or urgency. Most still think they'll be gone by the time it gets bad, and that it's a long term problem.
Any and every way you can make people understand this is a "right now" problem helps