I couldn't help myself so I looked this up now for BWI and DCA.
There is one winter I can find which should give weenies hope: 1913-14.
BWI was shut out until Feb. 6, when 0.2" of snow fell. That was the start of a pattern change featuring below average temps and numerous nickel-and-dime events, until the season finished at 23," which was 3.7" above the 1991-2020 average. DCA was shut out until Feb. 13-14, when 6" of snow fell. The final total at DCA was 28.6" which was 14.9" above the 1991-2020 average.
Second place goes to 1965-66, where BWI was shut out until Jan. 22-23, when 2.1" fell. DCA was shut out until Jan. 26, when 6.9" of snow fell. The airports ended with seasonal totals of 32.8" and 28.4", respectively. As 1965-66 has been touted as one of the top analogs to this winter, it's probably best to wait until around then before being reaped.