I dont know if there is any info out there on that or not....I am sure there is a chart from a study done somewhere. It just depends so much on some other factors that it is hard to average....lake/pond depth, wind, etc. I always figured that once the temps got below 15 it was making close to an an inch (maybe a little less) a night. With the snow on it I know it depends on depth of lake, depth of snow, etc. in terms of how much snow deters the formation of ice due to insulation. Would be cool if someone out there has data on this, but I doubt it.
goody