41 years ago -- one of DC's most notorious blizzards struck on Presidents' Day weekend.

[mahatmakanejeeves]

1. "Only the Knickerbocker Storm in ... 1922 and the Valentine's Day blizzard in 1899 were larger."

There was said to be a storm in Jefferson's lifetime that was bigger. The official measurements go back to 1885.

Washington, D.C.
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Geography
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Climate
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Blizzards affect Washington on average once every four to six years. The most violent storms are called "nor'easters", which often affect large sections of the East Coast.[75] From January 27 to January 28, 1922, the city officially received 28 inches (71 cm) of snowfall, the largest snowstorm since official measurements began in 1885.[76] According to notes kept at the time, the city received between 30 and 36 inches (76 and 91 cm) from a snowstorm in January 1772.[77]

{snip}

[75] Watson, Barbara McNaught (November 17, 1999). https://web.archive.org/web/20101231041158/http://www.erh.noaa.gov/lwx/winter/DC-Winters.htm, "Washington Area Winters". National Weather Service. Archived from the original on December 31, 2010. Retrieved September 17, 2010.
[76] Ambrose, Kevin; Junker, Wes (January 23, 2016). "Where Snowzilla fits into D.C.'s top 10 snowstorms". Washington Post.
[77] Heidorn, Keith C. (January 1, 2012). "The Washington and Jefferson Snowstorm of 1772". The Weather Doctor. Retrieved January 25, 2016.

Note [75] is at archive.org. Links to that site don't show up correctly.

The Knickerbocker Storm is remembered every year at DU:

Monday, January 27, 2020: On Friday, January 27, 1922, the Knickerbocker Storm started.

Monday, January 28, 2019: Today is the 97th anniversary of the greatest loss of life in the District of Columbia.

Saturday, January 28, 2017: Haunting faces, scenes and stories from the Knickerbocker Theatre roof crash 95 years ago