There is no such thing as "luck"-- when people can't explain something they resort to this kind of magic.
The pattern in the early 00s was part of the impact of climate change too-- more moisture in the atmosphere and changing storm tracks storms that would normally be suppressed like they were in the colder 80s were now tracking favorably for us. You just have to look at how DC snowfall totals have plummeted as proof-- in a way, we are getting some of the snow that should have been theirs.
Now that climate change has further evolved with the warm pool and even warmer conditions, we are going to start to learn what it feels like to live in DC. The climate is always changing and there is no such thing as "average"-- it's an always moving target, it's just moving faster now because of what humans are doing.