For the non pilots among us that's Instrument Flight Rules. IFR conditions are when visibility is so bad you have to rely on your instruments to figure out where you're flying. The only problem is on a bike there are no instruments, so I was riding by feel most of Tuesday night. In my 10+ years of riding in snow, I've never experienced problems like Tuesday. Into the wind, my glasses would cake with snow or the snow would melt just enough to refreeze into ice, and with the wind the inside of the glasses would fog up. So it wasn't the best winter ride ever, but I did test out some new lights that worked well.