Yeah, that outlier warm February really skewed the stats for that winter. That was the only month with above average temperatures and below average snowfall. December, January, March, and April were all cold, but that very warm February made the winter near normal to slightly above average temperaturewise.
April 2, 2018 probably should have had a snow measurement (people say the T measurement at the Airport was suspect to keep the seasonal total below 30 inches), but I don't really know for sure as I was on vacation in Portugal that day.