EdA says, "A terrible ice storm plagued the midwest (of the USA) from 12/29-12/31 2006. A friend of mine is a pole worker out there and sent me a link to some incredible photos." Link. Above, a confused cow surrounded by ice-coated grass that can't be chewed. This is another great shot: JPEG Link.
Update: BB reader Sarah corrects my previous, erroneous subject line:
These pictures are actually from central/south Nebraska, not Montana. This is the same storm that dropped a bunch of snow on Colorado (which got all the press).