“So quiet you can hear the snow?”
So … (that) … describes a degree that produces a result. Here that is omitted: So quiet (that) you can hear the snow? means “Is it quiet enough to hear the snow?” Omitting that is common in conversation.
A1-04 / CEFR A1 / EPISODE 04
Describing your hometown
SceneAt school, talking about Frank's hometown.

WORDS & CONTEXT
So … (that) … describes a degree that produces a result. Here that is omitted: So quiet (that) you can hear the snow? means “Is it quiet enough to hear the snow?” Omitting that is common in conversation.
Here miss means to feel sad because someone or something is absent, rather than to fail to catch something. I would miss … describes a hypothetical feeling if the speaker were away. Frank's I would miss the snow. uses the same pattern, and I'll miss you. in A1-60 uses the same meaning of miss.