Weather science
How is snowfall calculated?
Snowfall estimates are often based on the amount of liquid water contained in precipitation. Meteorologists use snow ratios to estimate how much snow will accumulate from a given amount of water.
Formula
Snowfall conversion formula
Snow Depth= Liquid Precipitation × Snow Ratio
A common snow ratio is 10:1, meaning one inch of liquid precipitation may produce around ten inches of snow.
Snow ratio
Why snow ratios change
Snow density depends on temperature, humidity, crystal structure, and atmospheric conditions. Cold dry snow usually produces higher ratios, while wet snow produces lower ratios.
Questions and answers
Calculator FAQ
How do you calculate snowfall from precipitation?
Snowfall is estimated by multiplying liquid precipitation by a snow ratio that represents the expected conversion from water to snow.
What is a common snow ratio?
A common estimate is 10:1, meaning one inch of liquid precipitation may produce around ten inches of snow.
Why do snow ratios change?
Snow ratios change because temperature, humidity, and snow crystal structure affect snow density.
Is snow calculator output exact?
No. Snowfall estimates depend on weather conditions and are best used as educational or planning estimates.