Was it IN the snowstorm?
The key there is that the higher the lights shine (at all), the more you look at snowflakes instead of what's ahead. Fogs as low as possible is what you'll be looking for. Probably lower than your bar is setup for. I've driven in similar conditions where there was unbelievable fog in the mountains of NH. I ran with no headlights at all and some Hella rectangular fogs very low, under the bumper. They do the best job and have a nice cutoff so you can see something. You still don't want to be out driving fast like you're a KenBlockwannabe but you at least can see the road.