Well...let's see...
1)Someone should slap Al Gore for this global warming we are going through...
2)I have been seing a change in snow patterns where I live, but the Northwest usually gets a lot of snow anyway.
3)It's not random. It's just been weather patterns, lately. There have been some strange fronts moving in, bringing with it rain which in cold temperatures becomes snow.
4)Have tons of fun. Go sledding and have some snowball fights. Also, try building an awesome snow fort or make a snow cave, too.
Hope that helps. Just have fun. I got a lot of snow, too, back in December. Most of it has melted now, but at the time I had to shovel a lot. I lost a lot of time and energy clearing snow. Just get out there and have as much fun as you can since it will all melt by the end of Spring at the latest most likely.