"Snowmaggedon" doesn't just disprove Global Warming; it shows we're entering an Ice Age! :-)
The show "In Search Of," narrated by Leonard Nimoy, warned us of the coming Ice Age in a 1978 episode. (Available on YouTube.) Here are some excerpts:
[Scenes of blizzards, glaciers, and snow-capped mountains, and dramatic, axe-murderer-approaching-type background music.]
"Climate experts believe the next ice age is on its way. ... When the weather turns on us again, how thin is the margin between life and death?