Actually not the best argument against Global Farting because while you need freezing weather for snow, if it's too cold it doesn't snow as much. So record snow in a place like Alaska might be the results of, yes, still freezing yet warmer than normal winter weather for them.
You get up more into arctic tundra territory, and despite being rather wet (permafrost keeps the ground pretty moist as summer melt water can't really go that deep into the soil because of it), they're actually deserts in terms of actual annual precipitation levels.
The Alaska Current is a relatively warm southwestern coastal current which has the effect of raising temperatures higher than they would otherwise be that far north. Warmer water means more moisture in the air, and thus more snow.
So unless you can establish that Alaska's record snowfall is directly tied to lower temperatures, it actually might be an indication of the opposite, or combination of factors pointing either which way. It could be because of the effects of air from warmer coastal waters hitting colder air inland, but that would be unlikely.
