The proper FAA conditions are intense, heavy snow of the warm, sticky type. Typically 1/4 mile vis in snow and blowing snow without fog, and OAT at -4C or warmer.
These are not easy to find. The French seem to allow parsing the test out, as reported, with intermediate visibilities, the FAA and CAA have been very reluctant because it isnt very easy to control (ie you are flying in supposedly permitted 1500 meter vis in snow and now it is down to 1000. You are in violation of an operating limit, do you fly to the nearest jail? Land immediately? Suffer an engine failure and make excuses?