How do I convert snowfall into rainfall equivalent?
It’s actually difficult to say, since it is dependent on the temperature of the atmosphere which the snow was produced and fell through. In general the ratio is about 10 to 1 to 15 to 1, with the higher ratio for colder surface temperatures. I have seen 30 to 1 and even 40 to 1 ratios during extremely cold arctic outbreaks. For your case I would suspect that the ratio would be close to 10 to 1, thus the 9 inches of snow would have probably had a liquid equivalent of about 0.90 inch of rain.
