An avalanche described as mind boggling in its scale and power occurred last Monday on Mount Shasta, but it went mostly unnoticed by humans until the weather cleared and the effects of the massive slide could be seen. The conditions for the avalanche were created by almost 7 inches of water and more than 4 feet of new snow above the 6,000 foot elevation. The slide patch now visible begins at around 10,500 feet and extends all the way down to 7,200 feet. It was estimated at 300 feet wide and 60 feet deep with debris piles even deeper than that. Nobody is believed to have been caught in the path of the wall of snow and no infrastructure was damaged. It happened, appropriately enough, in Avalanche Gulch.