I believe there's a ton of evidence that Global Warming is real and a genuine threat to our continued existence and that there's very little evidence to the contrary. Naturally, I'd like to believe the "It's not so" crowd is right but they make it pert near impossible when they say things like, "It snowed a lot today! So much for that Global Warming bullcrap!" From the moment it was first mentioned as a theory, the premise of Global Warming was always that it would lead to new extreme temperatures in both directions. This is not a difficult concept. You have to be really, really stupid or really, really dishonest to argue that a record cold spell or blizzard disproves the existence of Global Warming.
I don't believe that a really, really hot or cold day is solid proof that Global Warming is or is not occurring. But if you're in the "reallly, really stupid" category — if you argue that a record snowfall disproves it — you ought to at least be consistent enough to say, "Hmm…today is the hottest September 27th on record in the history of Los Angeles. It's 106° at Evanier's house. Maybe there is something to this Global Warming stuff." Like, I said, I'm not claiming that proves anything. But if you're really, really stupid and not just really, really dishonest, you would apply the "logic" in the same manner.
And I note that you almost never hear anyone on the other side — the side that believes our climate is changing — say, "Hey, it was really hot in L.A. today! That proves Global Warming is occurring." They don't need to resort to that kind of junk science because they have the real kind on their side.