In affected areas, wet, heavy lake effect snow with a snow-water equivalent (SWE) ratio of between 6:1 and 12:1 (in comparison, the "powder" so prized by skiers is 25:1) and with a weight in excess of 9.8 pounds per square foot) piled onto trees which were still in full leaf, leading to significant damage trees on a scale usually associated with hurricanes. An estimated 400,000 people were without power on Friday the 13th, some 100,000 households remained without power for a week, and a few thousand remained without power for ten days.