http://nuclearsecrecy.com/nukemap/classic/?lat=45.8371591&lng=-78.37912389999997&zm=6&kt=13000000

I would love to see a fallout game in a more snowy area for once, thats what made skyrim so fun to me.

Where did the data on the blast force come from in regards to the alien beam strike? Seems like a rather large area

Anchorage...

We blew that up in Mothership Zeta.

You might have done that, but not everyone has or at least not did it for their main save. It is a completely optional part of the DLC.