Montana's storm season has been much more active this year than it has in a long time.  On July 27th, 2010, 2 people died in a rare tornado that struck near Reserve, MT.
The National Climatic Data Center reports only two other deadly tornadoes in the state since the 1950s.  This makes Wednesday's storm quite a headline maker.  It's also noted that it's rare to have a deadly tornado in Montana because of a low population.
According to reports, McCone County saw a deadly tornado in July of 1983 and another was recorded in Wibaux County in 1952.
The Associated Press reports the tornado Wednesday pulled a farmhouse from it's foundation.  A 10-year-old boy and a 46-year-old man died.  
Winds reached an estimated 150 miles per hour and a National Weather Service Spokesman says there have only been four tornadoes in Montana that have reached EF3 status.

http://www.youtube.com/watch?v=_ejsRHRvWKc