After hitting the ground running with winter storms in mid-January, the D.C. region is making up for lost revenue – but still behind seasonal snowfall averages. The strong El Niño winter of 2015-16 was the last time Baltimore reached or exceeded its seasonal snowfall average of 19.3 inches. For both Reagan National and Dulles International, five years ago during the weak El Niño winter of 2018-19 was the last time average snowfall of 14 to 20.2 inches accumulated.