Prior to that the most recent snow was also around Christmas 1989. We saved our copy of the next day's T-P which contained images like this one.
I think we got about a half an inch. It shut the whole city down. No one went to work. Lots of people's pipes burst. I'm not sure how the cold weather and snow impacted those few days in the world of "New Orleans Industrial Development" but the board seems to remember it fondly.