how many inches of snow does it take to equal one inch of rain?
Originally Answered: How many inches of snow will 1 inch of rain produce? That depends on the air temperature and how much moisture there is available. For example, a dry, powdery snow is likely to have a 20:1 or 30:1 ratio...that is, 20 or 30 inches of snow would be equal to 1 inch of rain. A heavy, wet snow, on the other hand, could have a 5:1 or 6:1 ratio.