You don't want your house to be like the Metrodome

You are probably wondering if your roof can support all the snow that fell last weekend (just look at the Metrodome!).  Roof trusses are designed to withstand very heavy amounts of snow, so you don't need to worry.  You probably should shovel the first 3-4 feet to prevent ice dams, but you don't need to shovel the entire roof.