I literally just installed tern in atom a few minutes ago and it works. This is the .tern-project file I generated, but I have no idea if it's optimal.

{ "ecmaVersion": 6, "libs": [], "loadEagerly": [ "node_modules/lodash" ] }

I'm definitely getting lodash method lookups and they work well.

I hear it's not a good idea to throw all of node_modules at tern -- but the same applies for WebStorm.