This movie shows a physics-based computer simulation of the Great Flood from Glacial Lake
Missoula about 15,000 years ago. At the time, an ice dam blocked the Clark Fork River near the Idaho-Montana border and backed up a lake about equal in volume to Lake Huron. When the ice dam broke a cataclysmic flood scoured much of central Washington State leaving a vast region covered with erosional remnants.
For more tsunami information visit http://es.ucsc.edu/~ward.