One snowfall does not disprove global warming, weather and climate are not the same thing. Weather is stiff like storms and rain and snow and sun, and climate is the overall average temperature, which is getting higher.
Okay, I have the unanswered question for you since you are so smart. Is this global warming and/or climate change new by how long? 10 years? 20 years? 200 years 3.5 billion years? When did it all started?