Where to Find and Catch Snorunt
From Pokemon Go Wiki
Snorunt are found and captured in Nest and Habitat locations.
Nests
Snorunt Nests are locations that consistently spawn Snorunt.
Habitats
Snorunt Habitats are spawn locations where Snorunt is likely to be encountered, but not guaranteed the way a Nest is.
Additional Tips and Information
Best Nests
If you know a really good nest or any of the nests above is really good, list them here: