2015...Mar 2018 was pretty good but that double digit pack lasted maybe 2 weeks before dipping back under double digits. Peak depth was over 2 feet though in that one. Jan 2018 was similar...we achieved double digit pack on 1/4 and prob lost it around mid month with that obscene cutter.
Weve had double digit pack since 2/1 now this season. So I think you’d have to go back to 2015 to get it longer.