Loftan was saying that under those particular circustances on that particular day the dew point had to be 11 for snow to happen? This means, of course, that the temperature would have had to drop to 11°F for it to snow. I think Loftan's all wet. Snow isn't dew. The snow is forming up in the clouds where it's moister and cooler. You know you've reached the dew point if you get moisture on your car windows, frost if the dew point is lower than freezing.

How cold did it get that day you got the snow?