Artificial snowmaking is a complicated process, but it's one that's important to ski resorts this year as Michigan's weather stays balmy.
While it's possible to go really granular in explaining how snow guns work (everything from humidity to water pressure can change when snow can be made), it boils down to four basic "ingredients."
Click through the slideshow at the top for your snowmaking basics.
Want more detail? Midland-based Snow Machines Incorporated (which helped ready the slopes during the Sochi Olympics) has a solid FAQ section.